I looked around online but actually had trouble finding an answer for once!
Do you know if zebra otos and otos of a different species (unknown, but think they are vestitus or vittatus...i am real bad at figuring out what I have) will shoal together? I have 4 of the type I have now, and could possibly add a couple/3 of the zebras but wondering if I actually need 4 or more of each species as I have read Otos prefer to shoal.
because as ammonia is produced through waste, it drives teh pH down, rendering the ammonia non-toxic. There is no exchange of gas. When you allow the exchange of gas, it allows the pH to stay stable (in my case moderately hard) and allows teh ammonia to become exponentially more toxic.