Hey guys i could use some help starting sometime last week my zoas in my frag tank have slowly been closing up and developing this brown film which is eventually killing them. I have tried dipping in Revive, Peroxide and even a lights out thinking maybe it was cyano or something but it hasn't help. Here is a pic of one of the colonies you can clearly see the brown on them. I have been blasting them with a turkey baster on a regular to keep the detritus off them. Any ideas what i could do would be great!
Water Para.
Alk 8.6
CA 430
Mg 1320
SG 1.026
P04 .004
Nit 10ppm
Water Para.
Alk 8.6
CA 430
Mg 1320
SG 1.026
P04 .004
Nit 10ppm