A few weeks ago I ordered from BRS and decided to spend the extra money to buy "The Hammerhead Float" and see if it was worth the amount of money it cost. It is now on my list of one of the best purchases I've made! It has worked tremendously and I can't complain at all. Here is a link for anyone interested...
http://www.bulkreefsupply.com/algae-free-magnetic-glass-cleaner.html
http://www.bulkreefsupply.com/algae-free-magnetic-glass-cleaner.html