Help Dino Bloom !!!

[Murminator]

For the last month or 2 I have been battling brown/green snot (AKA DINOFLAGELLATES ) It grows on the glass, heaters, intakes and powerheads. But so far I don't have any on the rocks or the sand. It does not seem to bother any of the corals or fish just me. I have decreased my light to 6 1/2 hours a day, turned up the skimmer a bit to get more watery skimate and of coarse more water changes. I have been blasting the stuff of the glass to go through the skimmer and weekly dipping and cleaning the powerhead and heaters in vinegar. I have been changing 1/3 of the water every week and It seems to slow it down for a day then it comes back but it is never better or never worse there always is the same amount whether I leave alone of clean it off.
I am almost at my wits end with this what else can I do?
I have heard that using Erythromycin will get rid of cyno will it work for dino also?
Before you ask I am using good old tap water just like I use in the other tank with no problems, and I will do some tests in a bit to let you know how everything is running