GHA? Looks more like moss to me

[mcgallagherc]

Just looking for a positive ID. Thanks in advance

 

[PR_nano]

Green cyano, check nutrients, some attribute it to imbalance.

 

[mcgallagherc]

I was suffering from no detection on phosphates and very low nitrate about a month ago. First saw red cyano and now that that has been cleaner up and mostly cleared out this green cyano is getting out of hand. Blast coral I had went downhill very quick and pretty sure is dead now, torchs, hammer, chalice and zoas look great however.

 

[lost66]

+1 for cyano. You can use chemiclean and in 2 days you will have bright and clean tank.