I've had no problems with using magnetic scrubbers on acrylic as long as the label specifically says 'ok for acrylic.' As far as getting your arm wet, if you're keeping tanks with any of the additions necessary for live plants (high light, CO2), I can tell you that a magnetic scrubber is a must. For some reason that nobody will ever know, green spot algae loves the front glass in planted tanks. You'll find yourself using your scrubber more often because it's less of a hassle, and your tanks will look better because of it. As far as elbow grease, I find that if I make two or three passes there is little that my scrubber can't get. I'd rather make a few passes and stay dry than have an arm in the tank for 5 minutes... If this is a real issue for you, spend more on the magnet. Over the years I've found that _generally_, the more you spend the stronger the magnet. Hope that helps. Gimmie a holler if you want some specific brands. Chris Longman Web Development Engineer Driver Quality - Windows Team 425.707.9300 chrislo@microsoft.com "The team formerly known as WHQL" -----Original Message----- From: owner-gsas-member@thekrib.com [mailto:owner-gsas-member@thekrib.com] On Behalf Of Paul M. Carey Sent: Wednesday, December 05, 2001 6:24 PM To: gsas-member@thekrib.com Subject: RE: Just use one of those plastic scrubbies that they sell for your pots and pans. they work well. if you don't mind getting your arm wet. razors risk scratching your Acrylic. Paul -----Original Message----- From: owner-gsas-member@thekrib.com [mailto:owner-gsas-member@thekrib.com]On Behalf Of Simon, Dan Sent: Wednesday, December 05, 2001 2:08 PM To: GSAS member (E-mail) Subject: Can anyone recommend a good/safe algae magnet cleaner that can be used with Plexiglas tanks (if one exists)? Thanks, Dan