Math check - time to dose 1 gallon

[TCoach]

I'm trying to increase my alkalinity back to 9 (dropped to 7.6, but hourly kalk additions are holding it steady). I've got 1 gallon of RODI mixed with 3 tsp of Seachem Reef Builders to get it to +9 dKH. I'm dripping at 12 drips a minute.

Based on that, I believe it will be ~4.5 days to dose. Is that correct?

3785 ml in gallon * 20 drops in ml => 75700 drops

75700 drops / 12 drops min => 6308 min / 60 min => 105 hours => 4.4 days

Is that correct? I want to make sure I increase the Alk very slowly.

 

[homer1475]

Are you also considering consumption? That math will work as long as there is 0 consumption by the corals.

 

[Randy Holmes-Farley Verified Community Expert]

To expand on the above comment, kalk holding alk steady at 7.6 dKH is not the same amount of kalk as needed to hold alk steady at 9 dKH because alk and calcium demand generally rises as alk rises (due to increased coral use and abiotic precipitation).

I cannot check the alk math since I don't know the tank volume, but 3 level teaspoons of dry Reef Builder will raise about 120 gallons of water from 7.6 to 9 dKH.