Some interesting feed back from my ALK controllers guys, is the ALK is mostly consumed during the mid to late daylight period. Thats when the auto testers report the most drop and likewise the most needed additions. Anything you can do to level out the rollercoaster is always good. I'm saving for my APEX TRIDENT and DOS combo as we speak. I suspect a slightly higher amount of two part from 1-6pm in a light cycle might be typical to most systems. Maybe a ALK CONTROLER TEST SUBJECT reading this can chime in on their observations. Also I have found KALK in the ATO causes more complicated testing and consumption issues when used with dosing and so does high C02 in the home. I prefer the Salifert ALK test personally. I have used every one of them to date I think. Hanna is the one I have the least faith in unfortunately based alot off BRS testing videos and my own observation. Its sits on a shelf now. Keep us posted on your results. I find testing once a day is enough for me to understand whats going on and I am excited/ anxious to see what a auto tester/ dosing schedule can do for my system growth and stability going forward.