Please explain diff between Kalk drip and Calcaim Reactors

[perrygreene]

I am setting up a DIY kalk "reactor" and I cannot fully comprehend what it does and who it helps. Same for the calcium reactor. Are they totally different or do they attack the same thing?

Thanks.

[bertoni]

They are completely different, except they both add calcium and alkalinity to the tank. A kalk reactor stirs calcium hydroxide in freshwater, which produces a calcium and alkalinity supplement. This fresh water typically is dripped into the tank to replace evaporation.

A calcium reactor dissolves calcium carbonate into saltwater, using CO2 to form an acid. This article covers both:

http://www.advancedaquarist.com/issues/feb2003/chem.htm