I was sooooo tired of scraping coraline off the inside of my acrylic tank with a kent pro scraper.. my Forearms would cramp up .. I do have 24 squre feet of glass to scrap..
So I ordered one of these pads the mighty magnet algae dozer pad that will go on any mag cleaner with Velcro...
I put in on my Hammerhead cleaner..
OH LORD why didn;t I buy one of these a year ago..
VERY CHEEP and works like a champ cleaned one side in about 1 minute..
the only thing I have to scrape now is the top/bottom and corners..
heres a link
http://mightymagnets.com/pads.htm#dozier