Mollies are great fish, but can require alot of attention. They are tropical freshwater fish so you have to maintain a warmer temperature for them. Also you should add some aquarium salt as they like slighty brackish water. You can also purchase solutions to make your tank water similar to that of a freshwater tropical lake.
Unfortunately Mollies are very suceptable to fungus. It is very easy to spot, and if you can catch it early enough, it can even be treated without using medication. It will look like white cotton, and can appear on any part of the fish. I have found that if you catch it early enough you can just turn up the temperature in the tank and this will usually get rid of it. If this does not work, or the fungus is too bad, medicate the tank with a dose of fungus eliminator. Different brands will have different instructions, so please read the directions carefully before you medicate your tank.
Mollies are livebearers and the fry are very easy to raise. If you can, separate the mother from her babies as, like most fish, she may eat her own young. Myself and a friend have not separated our fry from the tank they were born in, and haven't had many problems. The babies can eat well crushed food very soon after they are born, and grow very fast.
Temperature: Since mollies are tropical freshwater fish, they enjoy warmer temperatures. Bewteen75-80 degrees F.
Breeding: Livebearers. Fairly simple to breed in community aquarium.
Feeding Recommendations: Tropical Flake Food. Mollies also feed on algae that grows in the aquarium.