Feed them to larger fish.
If you really want to raise them though, it would be wise to set up a small fry tank with a sponge filter. Or you could just make sure there is plenty of cover in the main tank and hope the parents don't consume of them. What size tank are they in now? What other fish are with the mollies?
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Current setups: 1800 gallon koi pond, 10 gallon planted, 150 gallon reef, other FOWLR tanks
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