So I have a 10 gallon with one male betta and currently three oto cats (I had gotten four as suggested by multiple sites, but one died during quarantine). They don't seem stressed, but I wouldn't mind getting one or two more if my tank can sustain them.
(My tank has been stable with my betta and 3 otos for over 2 months now)
There is probably about 8-9 gallons of actual water since the rocks take up quite a bit of room.
Here are some messy photos of the tank from both sides.
So... opinions on if my tank can support more otos?