Talk alkalinity stagnant

[ajtomase]

I have a 200 gallon LPS only tank and was wondering if any one else experienced their tank to stop consuming alk? Before mine would consume 1 dKh daily, and the past 18 hours it hasn’t consumed any. Corals still look fluffy, no signs of algae, my dosing system is off, and I performed a 20% water change on Sunday. Not sure how to break this stall...

 

[gbru316]

Did you change anything? Are your RO/DI filters/resin in need of replacement? Have you performed a water test?