Anyone tried this new? glass cleaner from Eheim? I saw it on today's email ad from Premium Aquatics. It's a battery operated submersible vibrating blade cleaner that the description claims can remove everything from algae to mineral deposits. I currently use floating magnets with and without a blade. They work O.K. but it would be nice to have something that cleans the glass on the first pass. With my current cleaners I have to go back and forth many times to get it clean.