magnet strength....

[tattoo]

i bought a 3 d background today that was suppose to be put up with magents....i guess the magnets arent strong enought to hold the background up....my tank is a 210 with half in glass....any suggestions what stength magnet i would need in order to make it work...thanks mickey carroll

[fshfrk]

This should work.

http://www.kjmagnetics.com/proddetai...od=DC6PC%2DBLK