[URL="http://www.bulkreefsupply.com/store/products/glass-cleaners/the-piranha-float-magnetic-glass-cleaner.html"]The Piranha Float- Magnetic Class Cleaner - English[/URL]\n\nI have had a mag float that I had been using since my 35g... recently it doen't seem to do much I would clean the glass every day and the next day it would be covered again. One of my reefer buddies has 'tiger shark' on his tank and I used it the other day and WAS SO IMPRESSED! I ran out and got one the next day.... The magnet is STRONG it does the job in one or two swipes, the MagFloat would scrub the same spot forever.... It does such a good job cleaning all of the stuff off you can't see... my tank looks great even the next day now! \n\nI got it at the LFS so I did pay like and well worth it!!!