I'm interested in getting some bottom feeders for my tank. I have a 36 gallon tank with 2 platys, on rubbermouth pleco, and various tetras (9 neons, 4 rosy, and 5 flame). I'm interested in some bottom feeders to help with the food/mess that has fallen to the bottom of the tank. I only give them one small pinch each morning, but I think my filter (bio wheel rated for a 50 gal tank) may be sending a lot of the food to the bottom. Will corys work as bottom feeders? The pleco is working okay, but not really doing the job. My substrate is standard sized gravel and river stones, not the sandy substrate that I understand corys need. Any suggestions? I have also been reading tonight that some folks only feed their fish every other day, rather than every day. I think I'll try that as well.