Is it impossible to beat? IVe tried chemiclean several times it did make a dent but within 3-4 days it is back full force. Held my nutrients at zero for weeks on end, coral were pale and LPS quit opening but cyano just looked great. Finally had to give in and dose nitrate and phosphate or all coral would have died. Tank looks like a flushing toilet with flow and they cyano has no problem even growing right on the wavemakers. Not even sure what other options there are.