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I set a dripper a couple of days ago and get relatively stable Alk. It's about 8 dKH now.
Since I added Alk supplement diluted in RO/DI, Kalk in ATO is also slightly less added. I did math. It turns out that Alk supply from Kalk is 1.35 dKH/day and now I'm adding about 1.5 dKH/day by Alk supplement. So my tank consumes 2.85 dKH/day now to sustain 8 dKH.
In conclusion, to raise Alk 7 dKH to 8 dKH, it's not like simply adding 1 dKH one time. While one time 1 dKH bump will bring 7 to 8 dKH, it will naturally decrease to 7 dKH again or even lower than 7 dKH in a day because of some CaCO3 precipitation or elevated growth. To sustain it at 8 dKH, I need to add 1.35 dKH/day more Alk supplement. Basically if you are using Kalk with full strength, you can't raise Alk without constant Alk supplement by extra.
Detailed numbers will be only valid for my tank. But I hope this information is useful to others who want to raise Alk.
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