Ok few things, a few tests have shown the UV output is not as bad from a DE bulb as we though, it is slightly higher but it is not going to cause skin cancer for the amount we are in there. yes glass as thin as 1/16" of an inch will take care of this.
is it good for the corals to filter out this UV, well this is debatable, UV will cause the corals to release pigments which help "color" the corals, but to much of the wrong type could cause tissue damage. so how do we go about regulating this. well glass will remove all of the "harmful" UV rays (can't remember the names either UVa, UVb or UVc) and will reduce the ones we want so the trick would be to figure out a way to measure the ones we want and vary your UV shield thickness to allow how much UV we wan t through.
Oh and where are the pics
Steve
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