[tknude]

From what I understand pruning of your algea in your tank should be done in combination with a water change to suck up all the loose parts. Perhaps this in tank pruning is just making it spread worse. I have always been told to remove the rock and scrub and pluck it under running water, then give it a good rinse before putting it back in the tank. I had a battle for months as well but got a phosban reactor, cleaned my rock as above, did a water change when the rock was out, and got a sea uchin at around the same time. So far the algea is staying down. As well I went to bare bottom and do 15% water changes once a week.