Sae

Stable water params, no ammonia, nitrite.

If your aquarium lacks a lot of good algae then add algae tablets or else try adding some zucchini or cucumber. They seem to like that.
 
The SAE's are the best, they do a way better job of cleanin my tank than my CAE's do and they arent aggressive...what I would suggest is to go buy a fake plant that reaches up to the edge of the water...leave it in there for a little bit and it will probbably start growin algae if the conditions are right...and my SAE's LOVE the algae that grows on my fake plants...I dont ever feed them anything and them and the ottos stay happy!!!
 
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