I have a betta and an albino bristlenosed pleco in a 10 gallon. It looks a little inactive. Could I put 4 cories in the same tank?
I don't think the tank is big enough for a BN Pleco long term and I certainly wouldn't add any other bottom dwellers.
Plecs produce a lot of waste and need well oxygenated water and 15G+ is the recommended minimum.
Ideally, you would be best moving him to a bigger tank and add a group of Pygmy Cories to your 10G.
Don't get me wrong, I am listening to every word you say.

You'll just have to make sure that it doesn't upset your Betta.
You'll also need to keep a close eye on your water stats.
Don't get me wrong, I am listening to every word you say.
I didn't think for a minute you weren't.
I'm just a bit finnicky about what size tanks Plecs go into.
