I think I am going to to hold off and re-think the lighting. If I can't use my 400w, I might just do SPS in a larger tank in my basement, and go with a softie/LPS tank with VHOs or PCs, as I have an icecap 660 I am not using. I could run up to 4x75w VHO with that ballast, or would PC be better?
Does glass lower the PAR as much as acrylic?
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