Tom,
Thanks for that.
I think based on all the feedback I have received the bigger issue here for me is the lack of precise control of alkalinity as a result of using kalkwasser in my ATO. Your experience with no RTN or burnt tips on SPS with an alkalinity of 8.9 - 9.6 leads me to believe that I may be able to achieve my goals by using a more traditional 2-part dosing regimen of alk, Ca, and Mg that would allow me to tighten up the alkalinity variations. That certainly would be the most cost effective next step.
Also, I may build a denitrator coil as that seems like a simple DIY project that I was unaware of until Jonathan's suggestion prompted me to Google it.
Thanks for your input.
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We're not put on this earth to see through one another; we're put on this earth to see one another through - Gloria Vanderbilt
Current Tank Info: 175g reef (48"L x 28"D x 30"H), 15g Refugium, 30g Sump w/ASM G3 (gate, mesh, & recirc mods), 10K GPH flow via 3 Tunze 7096 + return, ATO via Tunze Osmolater, 2x250W Radiums, GFO, Carbon, dosing vinegar/vodka, Alk, Ca, via 3 BRS dosers & Apex.
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