cowizzle

Izabela

Ooooh, yikes. WAAAAAY too many fish! Sorry, just that they must be so crowded in there. I have 7 mollies in a 50G tank. Not that you need that much space, but 20 Gal will be good. Your fish will NOT make it otherwise. The way to tell the sex...the girls will have a fan shaped anal fin (the one under their belly), the boys will not. They have a pointed one. If you have both sexes then you can definetely see the difference. You should ALWAYS have more females than males. Otherwise the males will often fight over the females and will basically kill the female, or exhaust her, making her more susceptible to disease. I have 2 males and 5 females, and still my boys often fight over the girls.

Another concern is that you added fish to an uncycled tank. The ammonia levels will go out the roof with the fish in there. I suggest asking the fish store if you can return them, or at least have them hold the fish for you until you cycle. If the ratio of males to females is wrong, most stores will exchange the fish for you. And as far as the amount of fish...all I can say, is go and buy a bigger tank like yesterday. Your size tank can hold ONE molly. Would be a nice setup for maybe a Betta.

Izabela

Stradius011

At the "breeding board" there is a sticky topic named "Sexing Livebearers" It shows how to sex guppies, mollies, swordtails, and platies.

cowizzle

genie

You can usually get a 10gal complete tank setup with filter, hood, light, usually comes with water conditioner, and sometimes a heater at Walmart for like $30-$50. It usually isn't much more to get a 20 gal starter set. The sooner you get a bigger tank, the better or else you might lose all of your fish. Remember the general rule is 1 inch of adult fish per gallon, and some mollies can get up to 5 inches I think. Good luck!