Many of the mat dwelling Cyanobacteria are resistant or tolerant to copper based algacides, as I eluded to in my 1st post. Cutrine-P, dye, and lack of bottom growing plants taking up bottom space as competition all helped create your algae problem. Eliminate everything else and something will colonize in the available habitat - that is how nature 'works'.
Last edited by Bill Cody; 08/22/16 10:33 AM.