By my calculation if you’re starting at around 7.5 in your display and you change 30gal out with 10dkh water that would bring you up to 8.125 in the first change. Personally I would just dose the part B to your display to get to goal. It raises my alk almost exactly as the bottle says. I’m kind of new to this as well so I would defer to someone more experienced on how fast you can raise it.120gal. So 25%, normally every 10-14 days.
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