DIY Betta fillter ?

[choob99]

I use a few different brands of sponge filters but for small tanks Lee's has small round yellow ones that work well for a small tank. I use Lee's, Aqua Lux, Hydor, and some others but the Lee's ones are usually sort of easy to find

[GhostFeather]

The one with the K1 stuff looks pretty good,I wonder if you could use small bio balls or the ceramic ones.

[choob99]

I'm not familiar with the K1 stuff one? do you have a brand name or an actual name for it so I can check it out?

[lvandert]

K1 is what its called. it is the brand name