Use this for hanging 3 M command Velcro fasteners- picture hanging wire –long plastic zip ties - fishing line or this stuff I use it in my tanks it works great its like a Velcro strap cut into strips and wrap around the fixture https://www.homedepot.com/p/GE-15-ft-Cable-Ties-Hook-and-Loop-Spool-Black-10375/304220195
have the cable out the back of the tank w/ the screen sitting on them it will be fine