Silver Dollars Foods/Feeding/Nutrition
Related Articles: Serrasalmine Fishes, Piranhas, Characoids/Tetras &
FAQs on: Silver Dollars (Metynnis, Mylossoma,
Myleus...spp.) 1, Silver Dollars
Silver Dollar Health,
Silver Dollar Reproduction,
Silver dollar fish, fdg.
Hi, I currently have 2 silver dollar fish (which we inherited from the
previous owners that had them for about 20yrs) in my tank. We read that
they eat lettuce and plants etc.
<Best to avoid terrestrial greens. These have little food value and
often bring in unwanted chemical fertilizers that may sponsor pest
We tried them on some lettuce and they freaked out when it was in the
tank. Today, we bought some elodea and again, they will not go near it.
Why are they so scared of green plants??
<Just unfamiliarity. In time they will recognize it as food and happily
munch away. Bob Fenner>
Silver dollars not eating
<Service to you!>
I have a problem with silver dollars not eating. In three weeks they
have only eaten once, as far as I can tell.
I have a 90 gallon tank with an 8 inch Oscar, 6 inch cichlid of some
<Oh! These might well be psychologically malaffecting your
who are both doing well, and 3 silver dollars. Yes, I know I should
probably have at least 6 silver dollars, but I do not.
<Three are fine here>
There is an established pecking order, with Oscar on top and dollars on
The dollars do get pushed around but are not really attacked or bitten,
just chased a bit.
I have not turned a light on over the tank at all since they have been
here. I do water changes weekly, and I change the filter components as
specified. The filter is overhanging, said to be good up to 110
<You really could use more... Much more here>
I raised the temperature a couple degrees recently, only because one
web page mentioned it may help (although I didn't really believe it
would) - the temp is usually at 75 but now up to 79, using one
<I'd use two here... and hide from the cichlids>
I have had the dollars for 3 weeks and they have only eaten once. They
have ample opportunity to eat, as I distract the other fish while
attempting to feed the dollars (Oscar loves to hang out with me). I
have tried floating flakes and pellets, like they were fed in the pet
store, as well as sinking cubes of thawed omnivore food ( a mix of
brine shrimp, plankton, veggies), beef hearts, krill, and even hand
picked and chopped earthworms. They simply ignore the food as it floats
in front of their face and sits on the bottom near them. I plan on
getting a floating live plant, in the hopes they will munch on that. My
guess is the Oscar will tear it apart but who knows. I cannot feed them
at the surface as they seem to be more scared of me than the other
fish. They are usually swimming about when I get home from school, but
hide in the corner when I am in the room. They looked healthy when I
bought them, seemed to adjust well, ate for the first time a few days
after I put them in the tank, but have not eaten since. They still look
relatively healthy, but show signs of deterioration. One seems more
pink-ish now than silver, and kind of seems to have his head caving
<A very bad sign... of starvation>
I would love to keep them, but they seem to hate their life. Any ideas
on how I can entice them to eat?
Masters Graduate Student
Crop Science, University of Guelph
<More a matter of incompatibility than feeding here. These S.
American Characoids need to be placed elsewhere... Apart from the
"terrifying" cichlids... Another co-factor might be water
quality... They do prefer even warmer water... and soft, acidic
conditions as well... But do move them to another system in any case,
and soon. Bob Fenner>
Re: silver dollars not eating 5/13/09
Thanks. I got that done...borrowed a tank, set it up, had the water
checked, got the go ahead to transfer the dollars.
Sad state of affairs indeed. I hope they recover, then I suppose
I'll have to find someone to take them. Thanks for your time
<Thank you for this follow-up, and caring, being human to make this
prompt change. BobF>
Re: silver dollars not eating 5/15/09
Thanks. Your response made me feel a bit better. I feel guilty and I
feel terrible for the fish. The first day in quarantine and they
didn't eat. Any special way to entice them or particularly tasty
treat that would be irresistible?
<Yes... palatable plant material... something like
Egeria/Elodea/"Anacharis" and warm water (low 80's
Now I also noticed the Oscar has Ich, must have just set in/become
My problem is the quarantine tank is in use! Would being in a
Rubbermaid bin or other such plastic container stress the Oscar out if
he can't see out of it?
<... See WWM re... I'd just raise the temp. where the fish
I don't know what to do, I don't have a third tank. How long
does it take to treat the Ich?
I'm sure that length of time can vary.. I just feel awful about
this whole thing, I want them to be healthy.
<I want you to use WWM. B>
Re: silver dollars not eating 5/15/09
You're right, usually I check all the articles first. Thanks for
your time :)
<Ah, good. BobF>