The wall whale is an add-on bolted to the standard brush you can buy from about 50 vendors. The fin's interaction with the water puts so much more floor/wall pressure into brush. I have it adjusted to it's hardest setting.

This tool is phenomenal! This really does as advertised.

This brush is more substantial and better designed to push against the wall, so gets the algae off better all the way down to the bottom. It even works when brushing algae off the floor.

Average product that works but comparable to others not worth $25. Company refuse to replace the broken part and the replacement costs almost as much as the unit itself.

The brush bristles are soo soft the sweep does no good. The brush is horrible on corners, between stairs or, god-forbid, acute angles. Will have to buy a round brush with good corner cleaning for any real brushing.