I have two divided, fairly heavy planted 10g tanks.
For each 10g, I have two average bettas, two sm-med mystery snails, two small otos, and one ghost shrimp. Is this too much of a bioload for a 10g? They have been running nicely for a month since the last cleaning (I had a nitrite spike and fin rot issue, so I tore each one down, keeping the filter media wet and undisturbed), with 0 readings in ammonia, nitrates, nitrites, etc. I do 25% water changes every 10-14 days.
Should I get rid of the snails? The otos seem to do a better job in cleaning any algae (which grows on the screen, but is now to a minimum). I was also wanting some Amano shrimp in the near future, but realize I would probably get rid of all snails before that.
I also have a 6.6g divided, with two bettas and one oto. No snails.
And last is a 5g with one betta, one snail, and one oto.
Note: Before I am told that otos prefer groups, I know that. However, they are doing fine and seem to be happy sucking on everything in sight. They have been in the tanks for 6-8 weeks, and seem fine.