[crazie.eddie]

I used to breed guppies. I used to put the guppies in a seperate 2.5 heated tank with filtration. I didn't see any noticeable growth either. If I left the fry in a breeder container inside the main tank with the rest of the fishes, the fry grew faster. Eventually, I wouldn't even bother placing them in the trap and just let the fry survive on their own in the main tank. I had allot of hiding places anyways. What my assumption is, the parents or other fish maybe producing some kind of hormone to all faster growth in fry. I have read that there maybe some kind of growth limiting hormone given off by some fish to allow them to grow faster compared to their tank mates, so maybe these hormones have negative effects on fry.