@Randy Holmes-Farley I'm reviving this thread with a few questions. You had mentioned that sand is likely the culprit of my increasing alkalinity. And along with it, a rise in calcium. What would you expect Magnesium to do? I ask because I am seeing a trend with my Neptune Trident readings that show a steady, small increase in alkalinity and calcium, but a decline in magnesium. Would this line up with your thought process? If so, would you guess that my system would experience a decline in alkalinity and calcium if I were to remove the sand altogether? I've removed about 75% of it, but I am considering removing it all.
Also - somewhat related but random question - in a FOWLR tank without sand or corals, would you expect to see a decline in alkalinity naturally, or would it just stay level? Just curious.
Thanks as always for your insight.
Also - somewhat related but random question - in a FOWLR tank without sand or corals, would you expect to see a decline in alkalinity naturally, or would it just stay level? Just curious.
Thanks as always for your insight.