Hello! I am new here. Just a quick intro about myself, I have a 75 gallon aquarium with a collection of assorted Mollys, swordtails, platys, tetras, and a few other fish that i dont know what they are called. I have artificial plants and pebbles and a liner that the rocks sit on top of. I try to breed mostly fish from the molly, platy, family. I have been breeding fish for a while off and on and when the fry are born they like to hide underneath the liner. They usually stay down there until they are like 3/4 inch to 1 inch long. My question is, there any way to keep them out so they dont get trapped under there? There are a few holes for filter tubes which are pretty big and that is basically the only way they can get out. But they dont come out. Does anybody have suggestions as to why they might go down there? Are they threatend by other fish?
Use a breeding net or something like it. Stores will sell a contain that holds the fry in the tank that separates the fry from the rest of the fish. I use it from guppies and swordtails.
The fry are actually protecting themselves from the other grown fish. Nearly all fish will eat any other fish that is small enough to consume, so this is a survival instinct that the fry are using. There are probably fry that are getting eaten, but the ones who hide are safe. When they're the 3/4 to 1 inch in size, they're too big to get eaten, which is why they start appearing at that time.
The fry net can work, though I've had adult fish suck the babies through the net to eat them. Also, if the weaker ones are getting eaten before they get underneath the liner, you'll end up with a healthier stock of fry in the end.
Either way you choose to do it, congrats that you are getting so many babies!
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