Planted Tank Guru
Join Date: Jul 2010
Location: British Columbia, Canada
Beautiful planted tank set-up.
Suggest though, that you keep a close eye on those Otos - it's quite evident they're attempting to get at the discus' slime coats as part of their diet.
As they get larger and more aggressive, they'll likely succeed - particularly at night.
It's happened to me more than once. I won't keep Otos nor SAE's with discus anymore, for that very reason - if nothing else, it gets stressful for the discus continually trying to brush them off.