This is awesome. My issues are going to go back to the 10.5-11DKH range. I was doing the 2000ml per day dosing and I watched everything climb hard, and I completely freaked out and shut everything down. For most of my reefing years I have tried to keep my levels around 9/450/1500. So is there like a saturation period with Kalk that I am not thinking about that needs to happen, hence upping the DKH to 10.5-11. Maybe that is my issue I am not understanding exactly how kalk is working in the system.Ok so I've been running this the same way for a while now and here's my thoughts on your situation.
So obviously stop dosing like you already have. So the main 3, alkalinity, calcium, and magnesium are a 3 legged table and as long as they are in balance the absorption rate will be the same. So IMO I would start right now by bringing up your alkalinity to 10 to 10.5 to match your higher elevated levels. And let that ride till they fall to the levels you are comfortable with.
These are the levels I am currently at.. but I also run elevated everything. So that being said you will want to set controls for your dose to ensure it doesn't go way out of hand, I dont know if you have that already.
You can ignore Line 4, I have a level sensor in mine because kalk plugs up lines and Ive had an overfilling situation that I never wanted to have happen again.. so you can see that my dose will stop if the trident tests beyond these set limits.
Obviously the only one that isnt of concern is magnesium. With a kalk reactor the only thing you should have to dose is magnesium. You will notice your calcium climb and your magnesium fall and for me once it reaches below 1400 i dose it back to 1450 usually once a week for me and the calcium will settle out. So with kalk its like finding out how much insulin a diabetic needs.. so you start with a low baseline lets say for your system with 100g total and a low moderatly stocked tank... I'd say set your interval to 2000ML daily and the apex will divide that up into a dosing schedule that will be spread throughout the day.
As you can see mine has settled out around 7000ML's a day
Or 53.8mL every 11 minutes.. now my tank is packed plus its plumed in with a sump a frag tank and another 20 gallon sump..
So watch your levels, only dose the kalk and leave out the all for reef for the time being if your dosing that too.. find the balance.. id say increase the interval by 500mL id say once every 3 days till your trident is showing a leveling off at the levels you like. My calcium swings no more that 30ppm a day and my DKH is from 10.5 to 11 all day every day. So the swings are minimal.
Also I saw that you have a ph probe in your reactor which is perfect.. if that ph falls below 12 its time to add more. Keep that in mind.
Now you'll find that depending on your tanks absorption rate you wont need an ATO anymore or very rarely used... but an optic eye in your sump to turn off the dos incase your evaporation rate doesn't match your dosing rate wont hurt...
Let me know if this confused you or you have more questions.