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FAQs on Marine Infectious Disease (Bacterial, Fungal, Viral)
Medications/Cures
Related Articles: Infectious Disease, Understanding Bacterial Disease in Aquarium Fish; With a gallery of bacterial infections, a discussion of “Fish TB”, and a listing of major antimicrobial medications with examples available to fishkeepers
By Myron Roth, Ph.D.,
Related FAQs: Infectious Disease 1,
Infectious Disease 2, Infectious
Disease 3, Infectious Disease 4, &
FAQs on Infectious Disease: Identification,
Causes/Etiology, Case Histories:
Bacterial, True Fungal &
Biological Cleaners, Cryptocaryon, |
Identifying and remedying the "real" or initial cause/s is
paramount. Treating symptoms alone is of no use. Antibiotics,
anti-microbials, anti-fungals and biocides (e.g. formalin) must be
used in "empty" treatment tanks, and with caution. Administration
may be through the water, foods, dips/baths, even injection. |
Dwarf Angel Fin Rot, quarantine methods f' – 11/17/07
Hello, <Greg> I am fighting a losing battle with a case of fin rot
on a dwarf angelfish in a 10 gallon Q/T. The fish did fine in Q/T for
about 10 days but then started getting ragged fins. <Maybe simply the
quarantine experience> The fins were just literally disintegrating a
small amount each day. I started treating with Kanamycin (SeaChem
Kanaplex) every 48 hours, but after 3 days the fins continue to erode at
a faster rate. The fish is eating fine <A very good sign> and all
water parameters look good as I have a full biological filter which is
surviving the Kanamycin treatment. Ammonia and nitrite are zero 3 days
into treatment. I did go without chemical filtration for about a week.
But once the fin rot started, I filtered with carbon and PolyFilter for
about 1/2 day and did a 25% water change before starting the Kanamycin.
I am concerned the Kanamycin is not working and I am wasting valuable
time to save the fish. Should I continue with the Kanamycin and if so
for how long? Or should I switch to a different antibiotic for fin rot?
At a loss here as I have used Kanamycin successfully for fin rot
before. Thanks, Greg <I would discontinue the Kanamycin, not
try other antibiotics... I would summarily pH adjust and freshwater dip
and place this animal in the main display. Please see here and the
linked files above for the thinking/rationale here:
http://wetwebmedia.com/dips_baths.htm Further quarantining will not
likely grant you anything... other than a more-stressed specimen. The
root cause of the "rot" is likely non-pathogenic. Bob Fenner>
Bacterial diseases Bob, I don't see on your site a section
on bacterial diseases. I did a search too. If you have a section,
could you give me the exact web address? <Hmm, all lumped under
"Infectious Diseases... of Marines" I believe... let's see:
http://www.wetwebmedia.com/infectio.htm> I finally put a few
yellow tail damsels with ick/white spot that would not go away with
environmental manipulations (high temp, low salinity, cleaner
shrimp) in a hospital tank with Cupramine. The white spots look like
they're gone but there look like there are a few tiny scars left.
<You have very good vision... these will be gone soon> We're
concerned our copper is not high enough (test kit keeps reading low
[approximately .3] no matter how much Cupramine we put in).
<Look to another test kit> We just slowly increasing the dose and
watching the fish for signs of copper toxicity (rapid breathing?)
and doing tests hoping that it will rise to the therapeutic range.
Any hints on what to look for if the treatment is effective? If
there are sores, does it take a while for that to heal after the
parasites die? <Lack of spots, normal breathing and swimming
behavior> One of the damsels has a lot of fin rot (front fins are
practically gone) and sores on his body (they aren't red and
hemorrhagic like the vibriosis pictures). None of the others have
erosion. All the fish have had the white spot and this guy has been
like this for several weeks so we're taking things slow--treating
first with copper. The one with fin rot appears to be getting
slightly worse. This guy is pretty aggressive so I don't think the
other damsels are munching on those fins. Dakin has a chart which
shows that the only 3 diseases that would cause fin erosion are fin
rot, TB/wasting disease or vibriosis--all bacterial. <Yes... if
due to biological action... can be lost due to chemical, physical
qualities... copper even.> 1.If we use antibacterial treatments,
that will kill our biological filter, correct? <Some will yes...
better to not get involved with these here...> How do we keep
nitrites down? <Induce nitrification is best... by using "used"
filter media, substrate... and second best by way of water changes>
The LFS told about a product "TLC" which is a liquid with bacteria
in it. Will that help us keep the nitrites down (we change 50% water
every other day already--it's a 25 gal tank). <Sometimes these
work. Worth trying> 2.Dakin recommends either Furanace or
Amoxicillin, or Ciprofoxin. We can't find food of this. <You can
"make it yourself"... Please see the "Furunculosis, Hole in the
Side" piece on the "Pond Index" on the www.WetWebMedia.com site...
same protocol for DIY antibiotic making there> If we feed them
rather than treating the water, would that reduce the destruction of
the biological filter? <Yes> Does it really matter which
antibacterial treatment we use? <Ultimately... yes. Even "broad
spectrum" antimicrobials are "semi-selective" in what they
influence... Do try the Amoxicillin first... if this can't be found
or has no discernible effect, and you still want to try another
possibility, the Cipro... lastly a furan compound...> We can't
even find those in our LFS but could find Furnace water treatments
via mail order. <Yes... but, as I say, by and large you really
don't want to get involved with these materials... not likely they
will do that much good/better than your attentions currently> By
the way, we think our Naso tang is OK now. He's fattening up and I'm
not sure the discolorations were really black spot. Thanks for all
the advice before. He's such a sweet little fish. We're very, very
relieved. <I as well> Our LFS said that you can tell the
gender based on the shape of the tail. Is this really true? <This
is a common theory... the "streamer" ones are males... Have a dearly
departed friend who worked on possibilities of culturing Naso
lituratus... the "streamer" ones are males, but some of the
"non-streamer" ones are males as well... Bob Fenner> Thanks!
AllysonRe: bacterial infection? Bob, Just to
clarify, you recommend against the antibacterial treatments and for
us to maintain the copper treatments for the full 2 weeks
recommended? If we do the antibacterial, then start with Amoxicillin
in the food. <Yes> Man, does it ever end? <Yes> There's
a lump on the left side of the body of our cleaner shrimp. Is this
normal? <Not unusual> Perhaps and egg sack? Or is it a
disease? <Maybe the latter, perhaps a growth anomaly. Nothing I
know of to "treat it".> The other shrimp we have doesn't have
it. Thanks again, Allyson <Steady on my friend. Bob Fenner> |
Fungus Amongus? Dear Mr. Fenner, I have a slight problem that
I just can't figure out. I have a 50g tank with one each of yellow tang,
flame angel, Bennett's puffer, and small cowfish. I began copper
treatment (Cupramine) four days ago for small black spots on tang and
ich on cowfish. I am usually quite careful about adding undipped
animals, but was afraid to dip cowfish because of possible toxin
secretion. Anyway, spots are all gone but as of this morning, cowfish
has two 1/4 inch areas of white fuzz, looks somewhat like he has been
touched with shaving cream; probably secondary "fungal" infection.
<Likely secondary, possibly fungal, bacterial...> His color,
attitude, and eating are great, same with all others. I have a bio wheel
filter, Remora skimmer, temp at 80, SG at 1.019, Ammonia and Nitrites at
0, Nitrates at 5, pH at 8.1, and not-so live rock now that copper has
been added (q tank is not big enough for all the fish, so I took out
inverts and am using big tank for TX). <Okay> I know from reading
your book and looking at your site that improving water quality is
usually the best mode of treatment, but I do not think that I can do a
h2o change or stop the copper TX this early. I do not want to add meds,
but think that this might be the only solution to saving the beloved
"Moo". I have heard that MarOxy <Maroxy, Mardel Labs> is not too
bad, but LFS does not carry Mardel products. Any other suggestions?
<Just time going by... keeping the environment optimized and stable...
the animals will heal of secondary effects. Bob Fenner> Thank you
very much. Christi Scott's Fairy Wrasse with infection I
have Scott's Fairy Wrasse with a huge swollen blister or growth on the
bottom of his lip. His color has dulled and his top yellow fins are
darkening. I have been reading about diseases and I think this is a
bacteria. <I would agree that this is likely> Please let me know
what you think and what kind of antibiotic could I treat it with.
Thanks. <A Furazolidone and Nitrofurazone cocktail (like Jungle brand
"Fungus Eliminator" at double strength in a bare bottomed QT tank).
Medicate three times in 5 days minimum. Also feeding medicated food if
the fish will take it would be nice. You may also do a topical swab of
the lip (Q-tip carefully... avoid the eyes and gills) when moving the
fish to the QT. Iodine or Mercurochrome will work fine (as with people).
dilute slightly. Leave in QT for 2-4 weeks (4 preferably) Best regards,
Anthony> Carmina Perez A Fungus Among Us? (Treating Fungal
Disease) Dear WWM Crew <Hi there! Scott F. at the keyboard
tonight...> I have a 210 gal tank with mostly angels and everybody is
eating and looking good except some of my angels are getting white tufts
on their dorsal and rear fins. They were scraping on my overflows so I
immediately checked my water quality and everything looked good. The
tank has only been set up for 2 months but I used the Bio Wheel and
media from my Tidepool II that came from their old home an 80 gal for
over a year. I did add another identical filter for 2 on the 210. I am
running a 35 watt UV. I did a 25% water change and added CopperSafe in
case it was a parasite. <I can understand your caution, but in the
future, I'd avoid adding any medication, particularly copper (which some
angelfish don't take well to, such as Centropyge species) directly to
the system. Better to get an idea of what you're dealing with before
medicating.> In the old days, I would take the fish out of the tank
and remove the tuft and treat the area with an anti bacterial
medication. The stress from catching the fish in a heavily decorated
tank was more dangerous to the fish I think. <Well, that is certainly
a consideration> Is there anything I can treat the tank with to cure
this fungus or whatever it is? I don't want to stress these fish
anymore. I haven't had a protein skimmer on the tank since I set it up
because Red Sea is mailing me another one. The water change seemed to
perk them up a little but the tufts are increasing! <Well, it's hard
to say without seeing the fish myself, but I'll hazard a guess and
assume that you are dealing with a true fungus of some sort, like
Saprolegnia. Typically, these types of fungal infections manifest
themselves on open wounds (either caused by some sort of trauma, or
bacterial infections), and can be eradicated rather easily with a
medication like MarOxy from Mardel. However, Even though catching the
fishes is a pain- I am a strong advocate of NOT treating for disease in
the main tank. So many potential problems. Really not worth it for the
trouble saved, IMO> I did treat the tank with Maracyn for a 5 day
cycle! Thanks Kirt Joseph <Well, Maracyn is very effective against
gram-positive bacterial infections and some fungal diseases. If it was
not effective, then you are almost certainly dealing with a "true"
fungus, better addressed with a medication such as MarOxy, as indicated
above. Also, do be vigilant about water conditions and the overall
environmental parameters of your tank, as these are often influential in
bringing on such infections. Good luck! Regards, Scott F>
Bacterial problem or something else? Hi guys, I have a new (8
months) saltwater 75 gal aquarium FOWLR. My 5 inch hippo tang has three
raised white blotches less that 1/32 inch each on the top of her
head. None of my other fish have it. <It could be a bacterial problem
or it might possibly be the start of lateral line disease.> It is not
ick but looks and probably is bacterial. <Bluck bluck bluck sorry.> I
have had an algae breakout within the past few weeks, have done the
Chemi-clean treatment removed the algae and done a 25% water change. My
algae problem has slowed however these little blotches are still
there. I feed OSI marine flakes, vitamin enriched brine, shaved shrimp,
formula one. Now for my question><Perhaps cutting back on the food
might be a good idea.> What I read is to use some type of antibiotic,
and it says that depending on what you feed, it may have an antibiotic
in it or to get one and soak their food in it. <The thing about using an
antibiotic is that it will also affect your bacterial filter. You need
to be sure what you have is indeed some type of bacteria before you
treat the tank. Have you taken a look at the FAQs to see if you can find
something similar.?> Well gee, ok, which one, how much, etc etc etc. I
am lost here for sure. My other fish are, Heniochus, yellow Longnose
butterfly, coral beauty, Percula, gold stripe maroon clown, green
spotted puffer. Let me know what you think and how to accomplish this.
<Once you can identify what it is Jack we can help you treat it. Please
look at the pictures and see if you can find anything similar. If its
lateral line that can be treated as well. Good luck, MacL> I
sincerely thank you for your help and anxiously await your reply Jack
Beckwith 80 gallon SW tank Hello, I'd just like to say
that I enjoy your web page very much. I look forward to buying and
reading your book. I have a question if you have time to answer it. (I
understand that you probably get a billion e-mails). <Not that
many... a couple hundred per day...> I have an 80 gallon SW tank that
I started at the beginning of January. I have very limited space
under my tank, and I could not fit a sump under there, so I decided to
try hang on stuff (despite many people telling me that I'd be wasting my
money). <Hmm, not so... as you likely know by now... much hang-on
gear is superior to non-hang on...> On the tank I have a Rainbow
Lifeguard 300 fluidized bed filter, an Emperor 400 BioWheel filter, a
Fluval 340 (containing carbon), and a Remora Pro protein skimmer. I also
have about 30 lbs of live rock (Fiji - I think). After it cycled I had
some damsels, a yellow tang, a bicolor blenny, a maroon clown, and a
dogface puffer. Well, I had a few bouts with Oodinium and ich and
eventually everything died except the tang and one damsel. After that I
treated the tank (with the tang and damsel) with Formalite II (as
recommended by someone on an e-mail list). The Oodinium and ich seemed
to be gone so I added a Valentini Sharpnose puffer. After I put him in
he scratched a few times, and I didn't want him to die so I treated
again for another week with Formalite II. <Very toxic material...
hard on all... live rock, fishes... deadly to invertebrates...> The
tank now looks good. I added 2 more damsels (that were in a reef tank
that looked really healthy from my LFS. My water quality is good - ammo
0, nitrites 0, pH 8.1, and nitrates around 15 (according to my Aquarium
Pharmaceuticals Salt Water Test Kit). The puffer and the damsels are
looking good, although the puffer scratched once the other day. The tang
looks bad. His lateral line is red, and his color is faded, but he eats
and swims around fine. I also bought a new heater (Ebo-Jager) in case of
temperature fluctuations being an issue. So, here is my question. Do
you think that my filtration is sufficient? <Should be, yes... not a
big fan of Rainbow's products period, including their "open" filters...
but in an ongoing system... with the Remora skimmer... no worries> If
not, what would you suggest I do (for the minimum cost). Thank you
for your time. Jim Moss <I would put your hard-earned money into
more live rock, a small (ten gallon) quarantine/treatment tank, perhaps
more lighting... and keep studying. Bob Fenner> My fish are
under attack Hi guys, please help me. I have a 120 f/o with a
Luna lion, porcupine puffer, Annularis angel and a zebra moray. < a
full house indeed> I have had all fish except the angel for over 2
years. The angel has been around for 6 months and was quarantined. I
brought on some sort of disease by letting my tank go a little long
without maintenance. I have always been religious with monthly water
changes but let it go longer last month so I think it is my fault.
<many stressors possible> In two days one of puffer's eyes clouded
over with thick white flaky stuff and I could see white areas on lions
fins. I did a big water change, lowered spg and turned the heat up
thinking environmental disease and preparing to wait. <hmmm... must
be careful with raising temperature when bacterial infections cannot be
ruled out... may make things worse. Bacteria thrive in warmer
environments> 3 days later and things are much worse, both puffers
eyes are infected and the lion has more stuff on his body. It doesn't
match up with anything I can find on your site. It has to be some sort
of parasite but the white chunks on the lion are much larger than ich or
velvet. <not at all... primary symptoms were not at all indicative
of parasites: cloudy eyes suggest water quality or bacterial infection
as do white chunks and see turbidity/necrosis on fins. Ich is merely
like identical grains of salt...never bigger or irregular as you have
observed. Still... there could be another parasite at work causing the
skin irritation and sloughing> The angel fish shows no sign of attack
on his body but his eyes might be a little cloudy, I can't really tell.
Whatever it is seems to attack skin as the angel has nothing on his
scales. I have two large refugiums (20 gallons each) under my tank which
I can use for treatment or I could put my rocks in them and treat the
main tank. I think medication is necessary but I have no idea what kind.
I have had these fish for a long time and will do whatever it takes to
save them. Thanks Sean from Denver <agreed my friend... do set up
bare-bottomed quarantine/hospital tanks with biological filtration (foam
blocks from seeded filters are ideal) and/or daily water changes to
maintain water quality. In combination, use "Quick Cure" as per mfg dose
(or like formalin/malachite combo) a and use an antibiotic with
Nitrofurazone and Furazolidone together in it (Like jungle "Fungus
Eliminator" at double strength). Dose for three to five days looking for
stabilization or improvement (again...do water changes too). Best
regards, Anthony> Black & White Butterfly Hello, <Steve
Allen again> The Butterfly fish had cloudy eyes on the second day after
I had purchased it. It also was breathing rapidly and had some black
spots on his body. <Could have been a primary parasitic worm infection
with secondary bacterial infection. Read about Paravortex or black spot
disease.> I searched on the computer and every thing I read pointed to a
Bact. infection. I purchased the fish from Petsoultions.com (which was a
mistake) Then I went and bought some med called Melafix which was for
cloudy eyes and bacterial infections. I treated the whole tank. I have
been told since that you do not treat a saltwater tank with any type of
medicines. <Melafix may not really be adequate. A real antibiotic in a
quarantine tank would be better. Don't beat yourself up about losing
this fish. It's really hard to save a fish that's already sick when you
get it. The downside of buying online is that you do not have the
opportunity to observe the fish prior to purchase. OTOH, the price is
right and one can often find fish that are hard to find at the LFS. I'd
let the tank sit fish-free for several weeks and run some PolyFilter and
carbon to remove any leftover medication. Quarantine any future
additions for 4 weeks. Read details on WWM.> Debbie <Hope this helps.>
Sick Koran Angel Anthony, <Seems to have dropped off the
planet> I have attached photos of my very unhappy Koran Angel.
<Good pix> She has been in my tank for about 3.5 years (Since she
was the size of a quarter). About a week ago, she started to get
red behind the gills. She has stopped eating, and now has cloudy
eyes. <Trouble> Prior to getting sick, no fish had been added
to this tank in about 9 months. My Blond Naso tang, now has a nasty
red patch from the top side of one of his gills. <Oh oh...> In
the past week I have done a 100g water change. I also turned off the
ozonizer, so as not to irritate the gills. <Might be better to
leave on... to reduce total bacteria...> I added some cleaner
shrimps and cleaner wrasses and they were all over her for the first
couple of days and then they disappeared (not unusual with cleaner
wrasses). Any thoughts or ideas ? Thanks, Dave B <Something
has gone sideways with your system itself... water quality is the
first thing I would check... You might want to add antibiotics to
your fishes foods... maybe even an injection for the more
valuable... all this is gone over and over on WetWebMedia.com Bob
Fenner> |
<Ouch!>
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Sick Polymnus Clownfish
4/17/05 I purchased a mated pair of Saddleback (Polymnus)
clownfish about 3 weeks ago. When I first placed them into my 12 gallon
QT tank, they seemed very healthy and readily accepted foods including
Mysis soaked in vitamins, Cyclop-Eeze and small pellets. However, after
two weeks or so, I began to notice some odd behavior in the female (who
is about 3x larger than her mate). She seemed very lethargic, mostly
swimming near the bottom of the tank without the usual bobbing motion
associated with her species. Once in a while, I noticed she would just
swim from one end of the tank to the other, sometimes gently bumping
into the tank wall before reversing direction. She also stopped eating,
but exhibited no signs of parasites or other diseases. The male remains
very healthy. <A. Polymnus aren't the hardiest of clowns and often
fail to acclimate to captivity. The black variant seems to do somewhat
better. If these are wild caught specimens, I would suggest that you
research and rule out Brooklynella (usually indicated by thick cloudy
mucous on skin). If it is Brooklynella, both clowns must be moved to a
hospital tank and must be treated with Formalin baths.> A couple days
ago, I moved the pair into the 60gal reef tank, hoping that a larger
tank would perk her up. After several hours, the pair began hosting in
my LTA anemone. At first I thought the female had perked up, but it has
been two days now and she is still not eating (it's been about a week
total since she stopped eating). This morning I discovered that one eye
is beginning to bulge out, looks like early stages of Popeye however the
eye is not cloudy. There is a small hippo tang in the tank which is
perfectly happy and only occasionally hangs around the clownfish and
their anemone although I've seen no biting. <"Pop Eye", especially
when only one eye is affected is most often caused by physical injury.
However, in her outstanding book on Clownfishes, Joyce Wilkerson
describes a very rare fungal disease that often causes pop-eye and the
other signs you have described. There is no certain way to diagnose it
while the fish is still alive, but she suggests that it can be treated
by soaking food in 1% Phenoxyethanol I don't have a brand name to
recommend, but it will be marketed as an anti-fungal medication (don't
substitute!).> What do you suggest I do? Is her strange behavior just
a result of the Popeye she is developing or is there a bigger issue
likely involved? Should I move the female (or both) back to the QT tank?
Should I treat with Epsom salts or Maracyn as you sometimes suggest?
Thanks for your help. You guys perform a wonderful service! Saahil.
<I would not move the fish again. The other fish have already been
exposed to the problem and further stress and physical contact with the
injured eye could be quite harmful. If the fish is not eating, there is
no way to get Phenoxyethanol into the fish (adding to the water is
ineffective), so you will have to offer tempting foods and wait it out.
Best Regards. AdamC.>
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