Get all males. Sell the females back to the local fish shop if you like or euthanise them if you can't find them homes. DON'T EVER EVER FLUSH FISH, NOT EVEN DEAD ONES! By doing this you introduce new fish into waterways in areas where they don't belong, along with any foreign bacteria they may … Read more

Guppies gestate for approximately 4 weeks. It's a little hard to tell at first if they're pregnant tho because the gravid spot doesn't darken the second she conceives.

The area at the base of the stomach is called the egg spot - it'll be very dark, even black, if the fish is pregnant. Same deal for platys and mollys, they are also both livebearers. If you want to keep the fry, you need to separate the mother out of the main tank into … Read more