Absolutely, the alkalinity issue is caused by the variable evaporation rates. I didn't mean to suggest that vodka dosing was causing unstable alkalinity.
However, based on what I've read, I am getting burnt tips and occasionally RTN'ing some of my SPS corals when my alkalinity goes above 8.0 dkH BECAUSE I am vodka dosing. I'm reading that if I were not vodka dosing, I would not suffer burnt tips/RTN when my alkalinity crept up above 8.0 dkH. That is why I was hoping the nitrate reductor would contain the effects of vodka dosing in the reactor itself.
I'll check out denitrator coils.
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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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