When I recently experienced The Attack of the Brown Algae after getting stronger lighting, I was advised to get 3 or 4 Otos for my 10 gallon tank. I got 2 to start, and was amazed at how they cleaned up most of it in only 2 days. Leaves (and plants!) that I thought would die are green and doing well. Amazing little guys!
Unfortunately one died. I am wondering if I really need even 2? Should I get my money back for the dead one or a replacement? It would seem that 1 is enough.
I have heard that they like company, but while they were both alive they never spent any time together.
Also, I am talking about Otocinclus affinis. I see there are other species. The Zebra is beautiful. Does anyone have a different species?