Can you add calcium hydroxide directly with tank water in a Kalk reactor

[rpgraff]

Just a thought and haven't been able to find anything searching the board, but what are the chemistry implications with trying to use a Kalk reactor to mix calcium hydroxide with tank water instead of RO water? Not so much for calcium and alkalinity control but for raisin pH when needed.

 

[CasperOe]

The kalkwasser will precipitate out if you use tank water. Not an option I would want to do.

 

[OrionN]

I believe that the high pH of the CaOH would cause precipitation of some components of salt water.

 

[rpgraff]

I believe that the high pH of the CaOH would cause precipitation of some components of salt water.

So adding a small amount of Kalk to a tank does not cause this, while pushing tank water up through a kalk reactor like the two little fishies Kalk reactor would be a problem?

 

[rpgraff]

The kalkwasser will precipitate out if you use tank water. Not an option I would want to do.

The calcium hydroxide? Or there would be chemical reactions that then precipitated out?

 

[Randy Holmes-Farley]

So adding a small amount of Kalk to a tank does not cause this, while pushing tank water up through a kalk reactor like the two little fishies Kalk reactor would be a problem?

Absolutely. You will instantly precipitate magnesium hydroxide at the pH attained. You will also precipitate calcium carbonate.

 

[jda]

Searching for Kalk Slurry might get you some more hits. This is what people called it when just dumped kalk into their tanks for pH, or other reasons.