How much KH do you dose throughout the day?

Rjedreski · Aug 10, 2015

I'm dosing 120ml on 100 gal and even have to supplement with
Additional Co of 30 to 40 ml to balance out and keep dosing all
4 elementz the same amount

Russ265 · Aug 11, 2015

i wonder if you guys dosing a ton are trying to keep levels elevated beyond 8.

15 ml a day but i keep my alk in the mid 7s. 300 gallon total volume. (newer tank though)

Greenstreet.1 · Aug 11, 2015

Hi is 8.3 low 7.7 salifert

Russ265 · Aug 11, 2015

Greenstreet.1 said:
Hi is 8.3 low 7.7 salifert

pic of your display?
you are almost at the 1ml per gallon mark

jolt · Aug 11, 2015

32 gallon tank, mixed SPS and LPS. Mine varies considerably so I test ALK every day.

Over the last two months it has ranged between 11 ml and 13 ml per day.

p0st · Aug 11, 2015

450 litres total volume, mixed reef. Currently dosing KH/alk in conjunction with Ca (Balling Classic), around 170ml a day, give or take

Downbeach · Aug 11, 2015

About 180 gal. net volume, predominantly SPS mixed reef; I was dosing 125mL of both Ca and Alk of Randy's recipe #1, along with using fully saturated kalk in my ATO. I kept my param's near NSW.

s2nhle · Aug 11, 2015

I have a 46g tank with 10g sump and 4g refugium. I add 2 tea spoon of kalk every week and that's it.

hectat2 · Aug 11, 2015

2 parts 40ml kh and 40ml calcium daily 60 gallon mix with 20 gallon sump

Greenstreet.1 · Aug 11, 2015

Russ265 said:
pic of your display?
you are almost at the 1ml per gallon mark

My DT is 98% sticks.

dylanmegyptian · Aug 11, 2015

I dose 4.5ml of each two part daily in a 18gal display with a 10gal sump

Randy Holmes-Farley · Aug 11, 2015

SouL_Shaker said:
Calcium doesn't decrease very much. But KH and MG decrease very much. I change 200 liters every 20 days with red sea coral pro salt. I was dosing 65 ml per day. I bought a plate coral today. KH was around 7.7 . When I tested it decreased to 6.6 after adding plate coral. I increased dosing amount by 20 ml immediately. Am I right?

If magnesium decreases more than about 10% of the calcium decline, that is testing error, or a water change messing with the apparent demand.

The ratios are relative fixed in the ways all three decline as corals deposit calcium carbonate.

For a 3 dKH drop in alkalinity, calcium will drop by about 20 ppm and magnesium will drop by about 0.1-2 ppm (depending on which corals are depositing skeletons).