I currently have 1 male betta in a 10 gallon. I recently added 3 otos - would have prefered to add 5 but the pet store only had 3 in stock at the time and the one I went to yesterday had none. I plan on adding 2 more this week.
At first my betta (Sayid) flared at the otos and nipped at them a couple times but he seems to be tolerating them better now. Would adding 2 more be too much for a betta? I read that otos prefer groups of at least 5.
I checked on stocking (using a stocking calculater website) and it said that 1 betta and 5 otos in a 10g is 93% capacity. Does this sound right?
Also I have a 20g long with 10 female bettas (and currently 1 black mystery snail) in it. The calculator said I could safely add 5 otos to it as well. But it did say i should probably upgrade my filter.
Would 10 female bettas and 5 otos be overstocking? I plan on removing the snail once I can find it. LOL