Algal turf scrubber: any experience with this?

[johnny rock]

hmmm wouldn't run out and build one just yet. theres a reason they went the way of the dinos. apperently they try'd a test at some university with reef tanks and scrubbers. they could never get nitrates down to decent levels. skimmers also supply mucho o2 which is really needed for many many reasons. I'd like nothing better than NOT to have a skimmer but I think its very needed.