I would say none, I believe they have a 30 gallon min. I may be wrong, I keep two in my 30 gallon doing 40 % water changes two times a week.
Thanks, there's definitely a lot of algae in the tank!
One seller only has 2 available so I'm going to order them. I have another source who will be getting more in stock at the end of the month, just in case something happens to one or both.
If you can't find any I can get some from my lfs for you. They are always in stock.
Nice, good luck with them.
I've had 1 oto for 2 years and he's very happy in his 55 gallon. The other fish are scared of him lol. He blends in so well with his surroundings that we play where's Waldo.
How are they doing?
I originally purchased 3, 2 eventually died. But I've like I said have had the last of the trio for 2 years. They are awesome cleaners. Mine keeps my bubble wand clean all the time.