I personally don't put my fry in with the adults until they are at least two months old (or 1.25 inches long) for several reasons:
1. The adults give off growth-inhibiting hormones, which cause the fry to grow very, very slowly.
2. The fry will struggle to get even the littlest amount of food unless there is a great deal of infusoria and/or a LOT of algae in the tank - and they probably will not eat the algae after all that yummy fry food / baby brine shrimp / crushed up flake.
3. Even if the fry don't fit whole in the adults' mouths, the adults can bite a good portion of their body off (at least the entire tail) and kill them.
So, I would advise you not to put them in the adult tank... but if you are going to anyway, the best way to judge whether the fry will be eaten is to put one healthy adult in the fry tank for six hours and observe how many, if any, fry get eaten. Feed as often and as much as you normally would.
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Sable on 12/25/2006, via cell phone camera.
This would be my avatar if the forum would stop giving me an error message!
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