I just bought a pair of Oto catfish last night because I read they are good algae eaters. But I am worried now today because I read that someone said they need to be in groups of at least 3, but also read someone say in big tanks like mine (30 Gallons) that they should be in a group of 5 at least. What is correct? Is there any other info about Otos that I will need to know in order to take good care of them?
The Otos are in a 30 Gallon tank with a sorority of 10 Female Bettas and 4 Cory Catfish.
Fish are God's RAINBOWS underwater