i have two, young cory catfish sharing my ten gallon tank with a dwarf gourami. when i feed the fish in the tank, i usually sprinkle just a little bit of food on the surface of the water which pighead (the gourami) wolfs up in a couple of minutes, and then put some flakes in the stream of my overflow filter, so that they are carried down to the bottom. the catfish eat these and spend a lot of time searching through the gravel for food. i have tried feeding them a few freeze dried blood worms, but the gourami always manages to find and eat all of those before any of them have had time to sink to the bottom, so the cories aren't able to eat any. i read something somewhere about feeding bottom feeders in a community tank with a tube. i was wondering exactly how to do this so that the blood worms would get carried to the bottom. should i place the tube in the downward flowing stream of the filter? where can i find a tube that would work well? thanks in advance for your help. this site is so great.