Spotting for cuckoo

If babie mollies are separated by sex will it still be a good idea to keep them? - babie with smelly urine

I come with more baby Molly fish. My plan is to create two large, rectangular pool in a small fish get women and men put in another. Do not overfill the tank and I have many friends with houses for them. Sounds good? I love my fish and I know it came out very easily, so obviously I do not want men and women in the same tank, but want to get a large quantity of fish.