ericmcj31;124793 wrote: ok--tonight I noticed some cyano growing on my front glass-this is the first outbreak I had since I initially cycled my tank--I'm thinking it's either this prodibio stuff or DT's (which I did overdose a little last week); I'm gonna give the prodibio reef booster stuff at least a week off-and see what happens. I'm pretty sure this is what caused it, I haven't had a TRACE of cyano in over a year-and this week it just appears?? Seems kinda funny to me