OMFG! Amazing. Truly worth every cent. I haven't cleaned my tank for about 3 weeks. 1-2 passes with the brown pad and the tank is clean. Hard brown spot algae and green spot algae came off like butter. <1minute of cleanliness used to take me WAY longer between that little blue scraper + algae pad. The tank is acrylic, but even if it were glass (I used to have one too), this would have way faster. Thank you Jeremy for directing me this way! Thank you Rick for the amazing product!