I have heard that the shimmer effect is created by having some turbulance at the water's surface. Is it possible that your 30"T has more movement at the surface than your 48"T tank?
I'm also thinking about getting these Beamworks LEDs. Looking forward to seeing pix of yours in operation. =)
Well, the 4' tall tank has an overflow box and benthic jets so the surface is turbulant. The one thing I have noticed form the beamworks being on the 30" tall tank is that it highlights every flaw in the acrylic.







