Hi I have too many black molly fish they are reproducing and I need someone to take a bunch of my hands the more you can take the better I just want to keep a few . I have alottt I couldn't tell you how many .. I have two tanks . So they need a 20 gallon at least and lots of aquatic plants that you can buy at PetSmart. The plants have the supplement food , the carbon dioxide , and potassium all found right where plants are sold at PetSmart. Ok then the fish eat colorful flakes and twice a day and you need to have two big logs in the tank for them to hide if they want . They also eat occasionally blend in the blender watermelon and peas . So empty the peas with liquid that comes in can into blender and then give them couple spoon fulls into the water they love it . They need that from time to time . They also need two to three air stones depending on how many fish in each tank . The air stone consists of the pump  ,the air stone, and the tube, all sold separate but in the same area at PetSmart. Besides the logs, the air stones, and the plants in the tank, they just need some color so couple fake plants but not take up too much room so you be the judge . But make sure you add color they need three different colors. Then twelve hours of darkness followed by twelve hours of light but keep the tank out of the sun too much . It's ok to have some sunlight coming in but in the summer for instance mainly do t have direct sunlight beaming on any tank for all day because it will make the tank water disgusting and eventually kill fish . So that's everything I believe. Any questions just ask but oh about them they are lovely . These fish are super peaceful and friendly and love to be around each other . They love to be in groups and have each other to play with and they are very peaceful . They are great to just watch and admire their beauty.