This Petzilla algae scraper features good absorb ability and powerful magnetic attraction. As you move the outer magnet, the inside magnet follows, hence cleans the glass. The inside brush will not sink into the farthest depths of fish tank as it is floating. Make sure you keep the Magnetic scraper dry after cleaning. Q&A: 1. How can I get the two pieces apart? I'm not strong enough to pull them apart. You just need to twist them apart. Or you can use a screwdriver or other object to pry it apart. 2. Can I use it on an acrylic tank? Better not because it will probably scratch some acrylic tank. 3. Does it work on curved or standard tank? Yes it works on both curved and standard tank. 4. Would this product work on windows? The brush side is made to be used in water. Dry it's likely to cause scratches and streaks. 5. Not clean enough? You can try using a cloth or a sponge in the middle to get best results.
