Well, I house my betta with 5 neon tetras. If your looking for something 4 and under you could try African Dwarf Frogs. They're cute and work fine with bettas

 

If you can find them and have a bit of a current panda garra are nice. They clean up the tank and eat everything from algae to dropped food to freeze dried/frozen/dead shrimp. They are happy little fish and pretty easy to care for. I just drop in an algae tab every other day, sink a bit of betta food for them, and keep a steady supply of ghost shrimp in the tank. I have had mine for two years and am for the first time dealing with an issue with them, but its an injury, not an illness.

 

I read White Cloud fish are good tank companions.

I want an African dwarf frog myself. They are ridiculously cute.

 

My girl is in with platys (very messy fish) guppies (obv wouldn't work with a male) and white cloud mountain minnows (golden and regular) she gets on great with them all.

My boy on the other hand wiped out a shoal of neons in 3 days.

All a matter of trial and error and the personality of the betta IMO.

 

Yes I just talked to an aquarium store owner who said it really depends. An aggressive Betta could just be best left alone. Owen seems rather aggressive so I guess he'll just fly solo.

 

Minnows are an option if you really wanted to test the waters, the regular silver are pretty dull and very fast. A shoal of 6 will only cost you £8.00, so if things did go wrong its not that much of an expensive snack

 

Thank you for all your replies! And my Betta is not aggressive, he does currently have an issue with intimidating the Cories and he tries to take their food but I think it's just because he needs time to get used to having tank mates.

I am considering getting Zebra Danios.. Anyone know if those would work?

 

Danios can be fin nippers and need lots of space. Preferably longer than high.

Great fish to watch though and very hardy.