Why is my alkalinity high and pH low

[Randy Holmes-Farley Verified Community Expert]

Thanks Randy. I'll post when I get my ICP labs back but my thinking was I needed AFR for everything besides alk and I was needing the kalk to keep my alk where I wanted it. Do you care to speculate as to why I'd go from needing 2L kalk/week to NONE for the past 2mo.?

Lower pH reduces demand for alk, as can things that irritate corals.

One can certainly skip the AFR and use a higher pH alk supplement and a trace element supplement, such as Tropic Marin A and K.