Ok, I have watched several YouTube videos and read reviews. I bought the Tunze Care Magnet nano, it seems to work well, but already lost it and had to go fishing for it. I only have the Red Sea Max Nano (20g) and the glass thickness is 8mm. Supposedly the Nano is the magnet for me (6-10mm). But I was also looking at the hack where they added a larger blade/plus the stainless, and the float. Seems like a good solution, or should I just get the Long, that is rated for 10-15mm glass which is thicker than my 8mm. Just wondering what everyone would choose. I sorta also like that the long comes with other wood options for the outside, and the float included....but might look a tiny bit too big, although when I tried the nano, it seemed like a lotta swipes etc that were sorta awkward and I had to go fishing to grab it when it separated. Which was several times....and I was not scrubbing hard at all, it's a brand new cycling tank.