05-03-2011, 06:36 PM
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Once the fry are free swimming my choice of clean up animal would be a mystery snail. If you work with trumpet snails or rams horns then you have the issue of rapid reproduction, which also makes more waste than they end up helping to clean up. Snails can be quite dirty. A single mystery snail should be able to handle the job without the breeding issues getting out of control, etc.
How much to feed the fry depends on a few things... first and foremost, the size of the tank they are in and the amount of circulation & filtration in that tank. The other thing that will determine how much and how often is the fry themselves. Watch them as they eat, watch for full bellies. I feed my angel fry on newly hatched brine shrimp and its pretty apparent when they are full because you can see the pinkish bellies fill up. (pinkish colored because of the brine) It will be important to keep watch over how quickly they digest the food and need more because they will stuff themselves to near bursting if you allow them to with too much food. At that age they don't know real restraint or anything about being full. If you feed them in the morning and come night they still have full tummies, then skip the nightly feeding and wait until morning. My fry are about 6 wks old and have only ever eaten once/day, they are now approaching dime size... an example of needs and growth rates. How many fry you need to feed will differ from spawn to spawn, so you may need more or less than what another spawn needs... let the fish tell you.
And... lastly, keep the water very clean. If you feed in the morning do a water change in the evening. If you feed in the evening do a water change in the morning. If you wait 1/2 - 1 hr before doing the water change you can be assured they are full and anything you are then removing is excess. Track that excess and use it to help you determine how much to offer at the next feeding. It takes a little time but you will quickly learn how to balance everything appropriately. Either way, fry will do best if they have something of a daily water change, even if its 10%.
I hope this helps.