Ok. So here is what I am doing to change the balance from GROWING GHA to reducing it...
1) added (10 days ago) reactor with 1 cup GFO and 1 cup carbon. GFO is gently tumbling. Will replace / clean monthly
2) reduced light cycle from 10 hours full (LED) to 7 hours with 80% max
3) purchased 15 large mexican turbos, 1 blue spot sea hare, 1 yellow tang (I wanted anyway) and got a Starry Blenny.
4) will clean skimmer / adjust daily.
5) will clean the rocks / easy to grab bunches every other day or so..
fingers crossed