most tetras like cardinals and rummy noses will take commercial flake food. Don't expect them to help in the removal of algae or snails in any way (unless you crush the snail in which case they will happily eat it).
50 Cardinal in a 3 ft tank should be ok... but 2 points worth mentioning...
1. You probably won't have much space for many other fish
2. Expect attrition.. its much cheaper to buy 50 cardinals at a go, but adding 50 cardinals to a tank with no fish will cause your tank to go through a rough cycling period. Expect to lose quite a few of these guys... Some people will suggest you buy a bag of feeder fishes and introduce them to your tank first.... let your filter kick in... after a month, scoop out all the filter fish, and introduce your cardinals immediately. You can also probably return the feeder fish to your nearest lfs... I'm pretty sure they'll take them back (for free that is).
Bookmarks