I have been meaning to get some bottom feeders for quite sometime for my g/f's 90 gallon tank. I know from everything I've read on this site that cories have a huge fan club so on the weekend I finally picked up 4 panda corys. It wasn't until I got them home that I realized I don't know as much about them as I probably should. What does one feed them? sinking algae wafers (g/f has them for her snail tank)? Or is there another sinking type food I should pick up? Also, while I know they should be kept in groups pf at least 4, even my LFS guy told me that they would be scarce on the bottom of a 90 and that I would probably eventually want more. Being as this is the first time I have seen them, I was also wondering whether is should be panda cories that I need more of, or if they will shoal with other types of cory as well?