otocinclus affinis or suckermouth catfish I think you're referring to do a
magnificent job on green algae on plants and the brown diatom type. Not
sure about their compatability with SAE's though as I think my otos stressed
my very young introduced SAE's to death.

SAEs and otos are compatible. I've kept them together for awhile now, and
rarely interact. They even eat different kinds of algae.


Leigh

http://www.fortunecity.com/lavender/halloween/881/