replace light bulb induces cynobaterica??

[banditpowdercoat]

Cyano loves Nitrates and posphates. It is usually allways in your tank. Just kept in check by the ecosystem ballance. Add something extra(the uncured liverock) and that c an throw the ballance over the edge. Same with changing the lights. Different PAR all of a suddden, can let it grow untill the ecosystem comes into ballance again