hey,

It will make life much easier if you get a bigger tank... There isnt much that can live in a 1gal tank. Maybe snails and shrimp..
The thing is with such a small tank the temperature is going to be constantly changing... on a warm day with a heater in it its going to be far too hot.. even a breeze from open window will change the temp.. this is very stressful for fish.

What are you planning on getting fish wise?

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211gal- 4 Clown loaches, 1 African butterfly fish,4 Dension barbs,2 Jewel cichlids,2 Firemouth's, Green Terror, sailfin pleco, L142, 2 cory's Candy striped pleco,4 Siamese algae eaters, 14 Black widow tetra's, Striped Anostomus, 3 Hoplosternum thoracatum, Fire Eel