These little things work very well, and reduce having to add more chemicals to maintain water, quality and clarity. And as always, the guys at spa depot, have Over exceeded their customer service and extremely rapid delivery service! Thank you, Tim W.

after a brief hiatus with quality scum balls has returned to their old excellent material

Works well but very expensive

Works great. To me they work better and last longer than the Scum Bug version of the same thing.

Does exactly what it's supposed to do. Soaks up any oil floating from sunscreen, salves etc and keeps the water much nicer.