Can I add solid kalkwasser to water change walter?

[Galeno rocha]

My aquarium holds 310 liters of water and I want to make a 100 liters water change.

I use natural sea water which I tested and the kh is 6.3. My tank's kh is 8.7.

I used Dieck's calculator which said I needed 2,1 liters of saturated kalk solution in order to correct WC's water alkalinity.

Can i add 3 grams of solid kalk directly to WC water? Or should I worry about precipitation? Thanks

 

[Cory]

My aquarium holds 310 liters of water and I want to make a 100 liters water change.

I use natural sea water which I tested and the kh is 6.3. My tank's kh is 8.7.

I used Dieck's calculator which said I needed 2,1 liters of saturated kalk solution in order to correct WC's water alkalinity.

Can i add 3 grams of solid kalk directly to WC water? Or should I worry about precipitation? Thanks

Id worry about precipitation. Unless you add it slowly over a day or two with good aeration, it will likely precipitate imo.

 

[Randy Holmes-Farley Verified Community Expert]

No, do not add kalkwasser to water change water. If you want to boost the new salt water, use baking soda for alk and calcium chloride for calcium. Kalkwasser will boost the pH too much and that will cause precipitation of calcium carbonate.