Ah Red - there is nothing sadder than an empty jar. Finally doing a bit of catch up on the things I've been neglecting for the past 3 months. Up a 100ppm on your water supplier - that's a big jump. Normally that number is fairly stable. Maybe your supplier has a bad chemical dosing unit or maybe just fixed one that was already bad. Hope your supplier didn't switch from chlorine to chloramine cause I don't think RO will remove it. My tap is shite too, 200-250ppm with a pH of 8.5. I only use it for flushing.
Will be watching your results with the new LED. Heat is always an issue with me - currently at 90F with both spectrums on. How do they keep it so cool? Is the power supply on the outside of the tent? Been in the market for a new LED and was looking into this one but I saw no mention of it on any of the US distributors sites.