I currently have a Red Sea E-170 with a Magfloat algae scraper. I've read both the Flipper and Tunze scrapers are best and will prevent scratching the best it can. I believe the front pane is 12mm, and the sides are 10mm.
I like the "Algae Free Hammerhead" magnet scraper. Nice strong magnet and does a good job cleaning. The wood exterior side looks nice too.
I have the Tunze. One thing I don't like is that when your either first "connecting" the outside and the inside parts magnetically, the scraper can detach from the main body and of course fall to the bottom. A lot of words of frustration over this.
Hello: I have the Tunze Long. I really like it, I have replaced the blade once, bought 3 extra to start with. I agree about the sinking to the bottom of the tank, a couple of times. You can read their info. sheet about getting closer to the sand, without scratching the glass. There are 3 sizes, if I remember correctly, depending on thickness of glass. Good investment.
I also have the Tunze and have had great luck with it not scratching the glass, even when getting down in to the sand. Just wish the internal piece floated AND the blades had a more sure mechanism for keeping them attached!
Flippers are great for glass tanks in particular. I never use the scrubber side, just the blade. Sent from my Pixel using Tapatalk
