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FAQs on Magnificent/Ritteri Anemone Health/Disease Treatments

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Anemone Success
Doing what it takes to keep Anemones healthy long-term

by Robert (Bob) Fenner

Heteractis Magnifica Anemone - Care and Medication Question    11/5/12
Hello! And thank you for your time.
<Welcome Brad>
First, some background. My tank is a 210g with a 40g sump. It has been running and healthy for just over 14 months. I myself have been in the hobby for almost 4 years. In that time I have taken a strong liking to anemones, and have had a great amount of success with them as a result of learning from sites like yours. In my current setup I have many corals, fish, and anemones that are all living peacefully due to careful placement and purchasing.
<Okay! Am sure you know of the dangers of mixing Actinarians, and doing so w/ other Cnidarian groups>
Five months ago I purchased a Magnifica anemone at a LFS. It did not immediately take to my system due to a low alkalinity, but was recovered and settled after about 2 weeks once I fixed that. About four months ago, I added a second Magnifica from the same LFS. This one never had any trouble, but for a few weeks fought with the old one for his spot and finally won. The first one moved to a different spot and settled a little higher, closer to the lights. Fast forward to 3 weeks ago. I sold the first Magnifica to a fellow reefer, and it is doing well. I did this to make room for a new Magnifica of a more preferred color, which I purchased from a reputable online seller. My question is in regard to this "third" magnifica.
<All right>
For the first 2 weeks it did well, and ate every other day with no issue.
About a week ago it suddenly spit out it's meal after dark on feeding day, and ever since then it has deflated and inflated repeatedly in a cycle of about every 8-12 hours.
<Mmm, doesn't like something here>
It does not appear to be timed to the light cycle at all. When it is inflated, the mouth does not completely close, and when it deflates, it has a badly gaped mouth.
<Also "bad signs">

I have heard some people suggest that it may be trying to fight a bacterial infection. What are your thoughts on my situation?
<Far more likely something, someone else in this system it doesn't "like">
The first Magnifica is still well, as is the second one, which is in the same tank, under the same light and flow as the new one. I have also done 3 water changes this week, as well as change out the carbon. All of my parameters are good (SG is 1.025, no PO4 or NO3,
<Mmm, photosynthates need some (measurable) phosphate and nitrate... sigh>

Alk is 11, pH is 8.0). I am considering transferring the sick anemone to a QT and treating it,
<Just moving it will likely help>
but I would like to know what you can share regarding treating these anemones. I have heard suggestions of using Tetracycline, Doxycycline, and Cyprofloxacin, with Cipro supposedly showing the best results, but no studies have been done that I know of. Any input would be appreciated.
Thanks again!
<I don't suggest exposing this anemone to an anti-microbial. Not of much probable value, and considerable potential downside. Bob Fenner>

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