I just take a little more time in cleaning the acrylic tanks. I shut off the pumps when using the algea magnet so that any sand that may be blowing around doesn't get caught in the magnet. I change cleaning pads on the magnet each time I clean the tank. (much cheaper than getting scratches buffed out). I regularily change the plastic scraper blades. As long as you don't rush, they aren't that hard to take care of. Hope this answers your question.