thanks for the info, Triggerman. At the risk of confessing my state of ignorance, can you explain the statement "DSB's are a pita". And I am assuming that sandbed infauna are creatures that live in your substrate that will eat this stuff... a natural and appealing solution. I bought a few snails that live in the substrate, encounter them occasionally as I do my "housecleaning". Are these infauna, or are you referring to other species? what are they?
Physical removal seems to be helping my personal situation. I have a sponge on a stick that I use to clean glass, and I also swipe the surface of rocks and macro algae to dislodge the cyanobacteria where its visible. This sets this stuff swirling around my tank, then while its "in solution" I use a net to capture the larger masses. I get everything I can into the net.Then hope my filter, skimmer, and critters will get the rest. After a week of this process the growth rate of the cyano seems to be slowing down. This is the second cycle I've gone through, hopefully I am nearing the end. And hopefully it will be a while before the next one! My skimmer was particularly gross tonite; even though I am careful about feeding amounts. My water chemistries are good, have a slightly elevated phosphate (0.25) and just replaced some absorber for that purpose. Oh well. Its better than cleaning the bathroom!