well you couldn't of asked here we would not have advised that tank, lol. each fish should have at least 2.5 gallons of water. Most here will recommend a 5 gallon for each fish regardless of sex, that is heated and filtered. They are tropical fish and should be kept as such and not like a goldfish with unheated water. You will need to do daily water changes to keep your water good for them. But if you read the thread I attached it will give you a lot of info for you. There are people here who actually divide there own tanks with making a cheap divider for normally either a 5 gallon or 10 gallon, maybe you will be able to get some tips from one of those members.