Tagging along, I have Cyano in my SPS 12 gallon AIO, it's only on my sand bed, not on my rocks at all. I siphon it out, break it into the gravel and it's clear for 1 day, next day it comes back about the same. Been doing this for about 3-4 days resisting not to use any product to ultimately getting it out of my tank.Are you doing anything to disrupt the cyanobacteria mat? For example, daily removal by siphoning? Using a toothbrush on the rocks (after siphoning) to disturb the biofilm, forcing it to reform?
Question, does stirring the Cyano into the sandbed bad? Can that hurt the corals? Most of my acros polyps open up when I do this as it causes nutrients in the water column and then the filers bring it back to crystal clear, just making sure I am not causing a mini spike of something when I break it back down into the sand, I just can't stand to see it sometimes. Tank is 6 months running... Phosphates .03 and Nitrate under 5ppm....


