What can you actually keep in a 10 gallon

Bettas
Blue Rams
Otto Cats
Cory Cats
Many Tetras
Tiger Barbs
Dwarf Gourami
Guppies
Endlers
Platies
Swordtails
Mollies
Snails
Crayfish
African Dwarf Frogs
Dwarf Puffers
Shrimp


And many more, I believe.

The better answer is: typically 1-2 species at most, and nothing over 3-4" in adult length. The smaller the tank, the more you want to stay on the understocked side as well, since the water can foul much quicker.

I am speaking from personal experience here: a betta.

Yeah, you can keep some small fish in it. I find it to be more enjoyable to have a bigger tank so you have more opinions with it.
For starters... with a 10g you can have a school of neons, tetras, guppy, zebra danios, and the list can go on (only a school at a time not zillion of schools ). At one point I've actually housed like ~12 fish (4 zebras, 3 neons, 1 catfish, 1 pleco, 2 unknown fish, and 1 guppy) in my 10g and that was overstocked but it worked if you're good with cleaning and feeding regime. I was still learning about fish and still am!
Thats my experience with 10g! I'm sure the others will chime in! :cool2:

Well everyone on here is into monster overkill, arguable in some case, not so much in others. I have an eclipse 7 gallon hex tank with 2 speckled cories, 3 male guppies, 1 female, and 1 power blue dwarf gourami. Im sure Ill catch flack for telling you, but everyone is happy, no nipped fins, perfect colors all my water parameters are fine. With a size like that, its all about frequent and good quality water changes (right temps, aged for a bit, etc). Im luck as i have perfectly neutral pH in my area and moderate hardness straight out the tap. Some may agree with me, some may not, while im sure others here will tell me anything less than 55 gallons is inhumane for more than 2 fish. Point and case this board is full of help, most of it useful. As far as a ten gallon? What ive listed in my 7 should work, the 10's Ive had worked well with Mollies, smaller schooling tetras, etc. Id think 4-7 fish total with ADULT sizes of under 1.5", or maybe like 10 neons. I hate the "inch per gallon rule" but it applies better to fish that are small and stay small. My two cents worth on that one.

How about a 30? you can see what I've got in mine and plan on getting like 5 or 6 white clouds to finish it off.

Don't do this, but I have two angelfish in my 10 gallon. But I'm moving them to a 29 gallon.

i'm cycling my 10 gallon right now and i'm going to put one male dwarf gourami and a handful of danios in it.

Got a few male guppies, 3 corys, and a few neons in my 10 at home. In the 10 ehre at work (just set up 2 weeks ago) we've got a male betta and a few corys, gonna add a couple of platys in a week or so.