I have so much problem with both
Cyano , I killed it using chemiclean
Then I have something green growing a lot, see pictures. What cab I do? Will snail clean it it is so bad that this is killing 2 corlas see pic.
it looks like some sort of green film or hair algae. I would manually remove as much as possible by hand. Blow with a turkey baster debris from the coral bodies 1x or 2x daily. If it were me I would also research peroxide dipping zoanthid as this can give it a algae free start again even if that will not resolve the algae itself but you do need to keep them off coral as it irritates them. Hope it helps and keep at it that is not that bad