well its a hexagon so i just guessed the thickness, hopefully its that, because the noise is driving me crazyMake sure they are spaced exactly to you tank specs... That could be the issue right there.
We got them on craigs list . quader's my son .Sorry, but I gotta ask... where'd you get for a $100 each?
Obviously from someone really needing some quick cash or they've got too much cash to worry about it.
D