<a href=showthread.php?s=&postid=10277693#post10277693 target=_blank>Originally posted</a> by MrMikeB
I use a magnet set that you can buy to attach a powerhead (instead of using the suction cups that typically come with them). They are super strong, and with a liberal amount of superglue, I attach a decent sized chunk of light diffuser. Given the physics involved with the weight of the frag plugs and the distance from the magnet, I typically make them about 10"x10" to prevent bowing or breaking the glue bond. You can fit a lot of frags on that baby - and have the beauty of being able to move it up and down inside the tank which is perfect for light acclimation.