Have 2 Nero 5's in my 66g reef tank for a couple of weeks. Magnets on pump are advertised for up to 1/2". My glass is 12mm ( 0.47" to be exact) and the pump barely stays on concave inside magnet. Every time I try to move it to slightly change angle it falls off very easily. Tank is just finished cycling and even though I see no algae on glass, I clean it every other day. Can anyone recommend a stronger magnet for inside or I might just superglue pump to inside magnet. Inner magnet is concave with a soft "foam-like" lining that pump sticks to but only 15degree movement which is really nothing, so thats why I'm thinking of gluing it on.