jpitts101
New member
i used marcyn to get rid of my cyano. it was all gone it 3 days. its bacterial medication for fish. cyano is also bacterial so it will kill it. and yes you can use it in a reef but i would use one fourth of what it calls for ( thats what i did ). anyway, thats my 2 cents. ohh and by the way i would not stop the phyto. phyto is good for many reasons, not just corals. its made my tank explode with life since i started.