[gofor100]

A few things to consider...

1) Taking all of your LR out to scrub it can stir up and release excess nutrients in the water, resulting possibly in algae growth.

2) If you have a filter sock, make sure that has been rinsed or remove it entirely (I don't use one because I couldn't clean it enough to keep down nutrients that built up in it).

3) I would consider testing the water you are placing into your tank for water changes (you mentioned that your RO/DI unit is 6 months old... it might be time to change the filters in it).

4) +1 on getting one or two tuxedo urchins... will clean up the existing algae pretty quickly

After you've done all of that, in addition to your reduced lighting schedule and maybe reducing your feedings to once per day (if you haven't already done that), you'll probably start to notice a difference after a week or so. Give it some time... nothing good happens quickly in this hobby.

Good luck!