well you need a heater. mollies like warm water about 70-82 degrees farenheit. and adding a tablespoon of aquarium salt per 5 gallons is best they live in brackish waters. so they can live in freshwater or saltwater but will be happiest in saltwater. and yeah a snail or a shrimp will be fine with mollies. and they will help keep the tank clean. mollies breed a lot so don’t be surprised if you see a bunch of little babies swimming around. and they live about 3-5 years

honestly you dont need a heat mat! i have four in a fish tank and all i have in there are the mollies some stones a fake plant and a litle guppy! ive had them for a few months now!

also when you feed them they like to nibble your fingers if you stick 1 in there! it tickles!

The only other thing your missing is something to remove the chlorine and other bad chemicals from the water. I used to buy a product called Start Right at walmart to go in mine. Also when buying your mollie be careful if your buying males or females. The femals under fin are triangle shaped and the males kind of go straight back in a line. Often the females in the tank are pregnant. Their normally pretty easy to spot though. If you do buy a preg female or buy males and females and the female becomes pregnant, be expectant for live birth. They just some swimming out. You would then need to buy a net thing that hangs inside the tank or buy lots of small grass for them to hide in if you want to keep them alive. Otherwise they will get eaten. I had a lot of mollies at one time. I loved them. Lived for years. Oh and you may want to buy a heater to go in the water too. You can constantly regulate it by adding hot or cold water but it’s easier to just buy a heater. They like water around 76 degrees. Oh yeah and a filter as someone also mentioned. If you buy a starter tank they normally come with almost all you need.

A heater and a filter, you sound like a beginner fish keeper, but that’s ok, everyone starts somewhere. You could get a larger tank and put a large quantity of mollies in there, (or just 2) but get male and female and breed them, (basically all you need to do is put them together and they breed like crazy! LoL) you can make a hefty profit from doing it a few times! But yeah, tank, molly, heater, filter, food, and probably company…

umm, you need a heated tank (about 80˚F) and you need some hard water. They need a good amount of space in otder to thrive. And they don’t really do well with tetra’s and stuff. You will also need a filter in order to keep the tank clean as well