Yellow Tang, Royal Gramma, Lawnmower Blennie, Clowns(2), Blue Tang in a 55 gal
That's the main reason IMO
. Reduce your bio-load to reduce your nutrients that the algae feeds off of.
Algae needs excess nutrients
to feed off of. Mostly it's levels of po4
above .03 ppm
that causes algae blooms. No3
plays a small role also but IME only if it's above 20 ppm
Test your source water for no3
and thaw/rinse your frozen before adding to the tank to help reduce po4
also. If your source water contains no3
get a RO/DI filter
Do you have a skimmer? Do you clean your filters weekly?
You're doing most of the 10 Step Plan for Nuisance Algae Control
already but overstocked tanks are aways going to be battling algae.