I noticed you are running a wet/dry with bioballs. Your Nitrate levels are probably high contributing to the problem. I would suggest you SLOWLY get rid of your bioballs and rely on skimmer and LR only to filter your tank. Also, if you can start a refugium with DSB and macro algae to reduce nutrients your problem algae are relying on.
Looks like you are in a real bind. Have you seen this thread?
http://archive.reefcentral.com/forum...hreadid=219002
Note: If you take the advise of the thread AZNO3 did not work for me when I was running my wet/dry with bioballs. It only started working when bioballs were removed.
Good Luck