tomorrow i am going to buy a few fish for my 20 gallon aquarium. i want a pair of 2 panda cories, and a few livebearers to start with. i was just wondering if you should have a special food for the cories, because i know they are bottom feeders, but will they eat floating flake food? i have tetramin topical fish flake food from my previous tank, but i was wondering what you cory owners feed yours