I have changed my RO/DI filters about a month ago, cleaner crew is mainly turbo snails astrea snails, red leg hermits, blue leg hermits, and a couple scarlets, also have a purple tang, tomini tang, blue hippo tang, and a gold ring tang, sand bed consists of just 15-20 lbs of carib sea just to fill the bare bottom areas, i currently dont have any macro growing in the sump but have had no problems with nitrates, I also switched out my big filter bag that the overflow runs into, i try to change these out biweekly to avoid any waste buildup. things have slowed down some after replacing my carbon and phosphate media but still present. I am trying the product algae fix and i can notice some of the hair / turf algae starting to melt so i hope this works. I will keep you posted