07-27-2009, 09:38 AM
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Bottom dwellers need a variety of prepared foods the same as the upper fish if they are to be healthy; don't rely on them getting leftovers.
I use shrimp pellets (sinking), Nutrafin tablets, and vegetable (algae) discs, all of which sink immediately. The corys go after all of these; other fish do as well, but that's fine, I put enough in to ensure the corys get fed. This is the morning regime; I alternate between the three types each day to provide variety both for nutritional value and their interest.
In the evening I feed frozen bloodworms or daphnia. In both cases I use a tube thing I made with a bit of flexible air tubing and a 20-inch piece of hard tubing, and I can squirt bloodworms or daphnia anywhere so I ensure some reach the bottom. Frozen foods are useful because they appeal to the fish's instincts, but in terms of nutrition they are inferior to prepared foods. With the good foods available today, fish can be very healthy on prepared food alone. However, the frozen does get them "stirred up" more, and that in itself is healthy.