Not nearly as efficient as a turf scrubberI also have 2 tanks with green turf algae that just won't go away. Both have refugiums, don't they function like an algae scrubber? I also have a good clean up crew including hermits, snails, conches and 1 tank has a diamond goby who just can't keep up. Phos is 0.06 in 1 tank and 0.08 in another. I clean the sand bed when doing water changes (2x a week for about 12 % total) as well as with a turkey baster. What am i missing here?