I’be been using kalk for the last 4 years. I use a clear plastic tote, and a line to my jebao doser. The tote is marked off for every gallon. When it gets down to 2 gallons, I add 12 gallons more rodi water (fill to 14g) and add 1/2 a cup of kalk. When I started, it was small 10ml doses every hour to maintain Alk. Now it’s 140ml every hour from 10am to 8pm and 240ml/h thru the night. My focus was to maintain stable Alk, the ph balance was an additional benefit. It now matches my tank evaporate rate, and almost meets alk/calc consumption (I started 2 part dosing also). Alk is day time low 10.6 night high 11.1dkh and ph is 8.4 days, 8.1 nights. BRS pharma Kalk has mixed the best for me. I think I fill about every 10 days.