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