Currently I have one Betta in a 3 gallon tank and 4 Dalmatian Mollies in a 10 gallon tank, after doing extensive research on how to keep them alive and well.
I have a 20 gallon tank sitting on the opposite side of the same room, waiting for inhabitants. It's 30.25" long, 12" deep and 13" tall. It was once the home to a hamster; that hamster has since gotten older and less active, and has been moved to a smaller home. It's been cleaned several times over and has been... sitting. Juuuuust sitting. So very lonely on its stand.
The main problem's been that I can't get the necessities for the tank. Today I went to the local PetsMart to look at the hoods and such in stock. For the first time in months, they had the right size in stock. I now have a hood. I need a filter and heater, which I can get when I get paid at the end of the month, and I'm golden. Substrate will be sand with a few rounded stones.
I'll transfer over my Dalmatian Mollies to that tank [after cycling, of course, with the help of Stability products.] and perhaps buy a couple of Cremecicle Lyretail Mollies that I saw for the first time the other week. I'll have 3-4 Cory Catfish for the bottom. It'll take a while to get and introduce all those fish, but it'll be beautiful once I get it all done!
I'll keep my 10 gallon as a way to help raise future molly fry once they grow too big for a breeder. I already have 4 fry from one of my Dalmatian females, 4 days old and in a completely separate tank from the adults.
...but that tank is still sitting. Stiiiiiiil sitting.