Power for themselves what it is, however,

Does the handling to be desired.
I'm 4 pool 4 different algae magnets whichever was palpable in use.
Unfortunately, I have to say that this is the worst of my magnets, and one of them is a 1.99 NoName China copy.
To put it in a nutshell:
The algae magnet is a good size for a 1 m pool.
He cleans the disc quite usable.
One has to be extremely careful that you are not moving too fast, since the non-buoyant inner part otherwise detaches and goes down.
Mir istbes so far failed to change even a single time without decaying inner part on the corner, so from a pelvic disc to the other. Everywhere else I know windscreen cleaners that's no problem. Even my cheap Far East part creates.
I thought, with a JBL he can do little wrong, I was sadly disabused.
All in all I can not recommend this algae magnet unfortunately.