I've had an algae issue in my nano so I took all the rock out and put it in a 40b. On the rock I have some hair algae and what I believe to be red turf algae. I've dose H2O2 about 4 times and each time increasing the dose. I started at 4oz and now up to 8. I usually dose no more than once a week. So far, it's done a pretty good job on the hair algae but it's doing a little damage to the red turf. The corals do recede when I dose but don't seem to have any long term affect. In there I have zoas, mushrooms, hammer, lobo, a chalice and 2 nems. I also have 2 clowns and a neon goby which don't seem affected. Also, 3 days after each treatment, I do a 10g water change.