Put a bunch in and actually feed them rather than letting them live off any algae buildup.
Just be sure to start out with good healthy stock.
Wondering how many otocinclus I should put in my 55 gallon community tank. I understand that they have impressive appetites so i don't want to put too
It looks like brown algae to me, if you take it out and run it under some water does it come right off?
Lots of Azolla in there too.
I love that plant