randalthor
Fish Fanatic
- Joined
- Sep 13, 2005
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I have a little tank, and it looks to be around 1.5 gallons. what can I put in it aside from a betta? Are there any 1g filters? 

The problem with most fish is that they need better water quality and better oxygenation than you are going to be able to achieve in such a small tank; also, for their wellbeing they need more room to swim. Bettas can cope because they are such slow swimmers and able to breathe from the surface.
Btw I hope you have plans of replacing the tank in your signature with something a good deal bigger; can't see any of those fish living to a happy adulthood in a 10 gallon.