Originally Posted by Calm13
So I just bought a pair of mollies this past Saturday notice one little fry in my QT this morning, so apparently one of them is a pregnant female.
Now that I look closer, one definitely does look bigger.
Doing some reading, it seems we should be expecting more fry? I've never bred fish and didn't have any intention of having the fry in there. I'm not sure if I should separate them or just let nature take its course. Any suggestions?
I would drop some stem plants into your quarantine tank. Livebearing fish get a sense of comfort if they have a bit of privacy and the fry need a little hiding space. If you've selected your fish carefully by checking the skin for blemishes, bumps, lumps and the fins for tears and not clamped close to the body and a plump body with good color and energetic activity in the water, your chances of getting an unhealthy fish is remote. So, a quarantine tank isn't needed and you never have to net the fish. Netting can be stressful for you and the fish, especially if you're not good at it. I also check to make sure there are no dead fish in the pet store tank.
Livebearing fish don't require it, but prefer a bit of standard aquarium salt added to their water, especially Mollies. A teaspoon or a bit more added to every 5 gallons of new, treated tap water is enough.
I always keep all my Livebearers in the same tank and heavily plant it and feed often if I see fry. Adult Livebearers are much less likely to bother their fry if they're well fed.
Just some suggestions to think about or not.