Hi I hope I can help you out. I've dealt with the same as well for at least a month now, but finally its starting to dissipate. The problem in my tank was for one it is still young and for two my phosphate levels were a bit high. What I did to help begin resolving the issue was first address the phosphate as they feed this type of algae when levels are unsuitable ,so I added a gfo reactor about a month ago, with the best gfo media availible which is that German brand. So now that the gfo is ripping phosphate out of the water, next to lessen the phosphate load I cut down feeding my fish to about every other, to every third day, depending how hungry they looked, and let's face in they are beggars, but they can easily survive with less food. The way I feed them is attract the to the top and drop just a few pellets at a time to make sure each fish got a share of the pellets without leaving any pellets behind about two pellets a fish,this may seem a little tedious at first but now this is how I feed them everyday now and they are perfectly healthy still and the phosphates are still coming down, and the dust algae is becoming lesser by the day.
Now while all this is happened I also purchased 100% polyester fill for pillows at the craft store and with the polyester I took a lot of it and stuffed it into the last chamber in my sump so the tank water would flow through it and not bypass it and return back to the tank, so with the polyester in place now everyday I scrubbed all the glass and I also used a firm toothbrush to scrub algae off the rock, then gave the top layer of sand a little stir to mix it up a bit. Now the tank looks like a cloudy mess for the next half hour or so, but now when the water clears up look in the sump at the polyester, I looks very dirty. Scoop that poly out and replace it with new poly. Now at first this was a daily thing plus a once a week water change but for the last two weeks in the month doing this process the phosphates have come down, and the frequency of the scrubbing cleaning and changing of the poly have also been reduced dramatically and I'm still scrubbing the glass daily but the poly stays cleaner longer because less algae on the glass.
So all said and done my tank was a pretty severe case and now I would consider it much less so. Thank god. This will work anyone with a mild to severe case as long as you stay focused on the process
same here. Cleaning my glass about every other day of spotty residue or whatever it is.
