What fish are in the tank ? Snails or Ottos may work depending. Yes, my Bristlenose is pretty good at keeping the tank clean. 10 gallons is a bit small for one, one of the reasons is they produce alot of waste.
Amano shrimp (you would need a small cave system for them ideally) would be perfect or a Nerite snail both would be safe to the majority of fish that would live in a 10 gallon.
My bettas do like to chase one another but there is just for/ I am gonnaa move 'em to a 20 high in about a week. I have a BN albino pleco in my 10 gallon, he/she is gonna be rehomed too.
I'm either gonna get a 20 galln high or a 38 gallon.