Just added the grounding probe and some K. We'll see what that does. If I get better colors, I suppose I'll have to live with it :P
The water column is actually pretty turbid, to the point you can see a solid beam of light from my PFO reflector. I can well imagine that the suspended particulate could irritate the corals.
The sand has to go anyway (I've got the use of a large filter to recycle the water), but the probe or K could also do it.
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Brad
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