Kalk numbers
- Thread starter Minifoot77
- Start date
- Tagged users None
What's your goal? To make 26g of water fully saturated with calcium hydroxide?
If so, the rule of thumb is 6g to 1 gallon. Your numbers are in the ballpark.
If so, the rule of thumb is 6g to 1 gallon. Your numbers are in the ballpark.
Randy Holmes-Farley
Reef Chemist
Staff member
Super Moderator
Excellence Award
Expert Contributor
Article Contributor
R2R Research
My Tank Thread
As noted, that value is correct for saturation at 25 deg C if you are using calcium hydroxide. I used calcium oxide, which takes less.
Should be about 169 grams. 6.5 grams per gallon I believe.
Randy Holmes-Farley
Reef Chemist
Staff member
Super Moderator
Excellence Award
Expert Contributor
Article Contributor
R2R Research
My Tank Thread
At 25 deg C, the exact solubility limit is 0.0204 M, which equates to 1.61 g/L or 6.1 g/Gallon of calcium hydroxide.
The solubility has an inverse temp relationship, and is higher in cooler water.
OP
OP
Minifoot77
Jack of all trades and a master of none
I think my basement and my ro water stays about 65° Fahrenheit. there was a little bit of residual in the bottom of the barrel. I dosed 4100 ml of this solution to my tank last night hoping my math was correct to replace 90ml of soda ash.
Randy Holmes-Farley
Reef Chemist
Staff member
Super Moderator
Excellence Award
Expert Contributor
Article Contributor
R2R Research
My Tank Thread
At 65 deg F, you can dissolve more. Residues can include insoluble calcium carbonate and magnesium hydroxide,
OP
OP
Minifoot77
Jack of all trades and a master of none
For 26 gallons what would your total grams be?
Randy Holmes-Farley
Reef Chemist
Staff member
Super Moderator
Excellence Award
Expert Contributor
Article Contributor
R2R Research
My Tank Thread
at 65 degrees? I’m not sure without looking it up, but I always added excess and left the undissolved material on the bottom for the next batch.
OP
OP
Minifoot77
Jack of all trades and a master of none
Ok so my kalk isn't strong enough for my evaporation... for 26 gallons of rodi at 67 degrees how many grams of kalk and white distilled vinegar should I be adding to get the most out of all this trouble I'm going throu lol
OP
OP
Minifoot77
Jack of all trades and a master of none
Thanks in advance @Randy Holmes-Farley
Randy Holmes-Farley
Reef Chemist
Staff member
Super Moderator
Excellence Award
Expert Contributor
Article Contributor
R2R Research
My Tank Thread
You can go to three tablespoons of kalk and 45 ml vinegar per gallon of fresh water.
OP
OP
Minifoot77
Jack of all trades and a master of none
9 grams? My scale is easier...
