As timbo indicated, it feeds off P04 - also nitrates.
Loves low flow/current areas - try increasing water movement in the problem areas.
Old lights? Aging bulbs shift spectrum, and this is often offered as a cause of cyano
needs food & light to thrive (as do most algaes). Food comes in thr source of phosphates, nitrates, etc. Good nutrient export (limiting feedings, using RO
water, possibly using a refugium, good skimming) - all these reduce the nutrients in your system. Also, maintain a low bioloads, having sufficient LR
, and a DSB
are quite helpful.
Watch the age of your lights, maker sure water flow/current is good, and keep a decent cleaner crew -- these are all excellent preventative measures.
Many ppl resort to antibiotics ("red slime removers") to battle cyano
. This can
be successfull if you've eliminated the orignal cause of the cyano
, and are trying to "clean up" the remnants. However, if you have not solved what is causing the cyano
, and you use an antibiotic, it is almost certain to return.