[Delphinus]

Two different beasts but work toward to a similar goal.

A kalk reactor is a just a fancy kalk mixer. Some use powerheads, some actually use stirring devices. You can dose kalk without using a kalk mixer. The simplest setup is a bucket and a dripline and poof, done.

So the reactor makes it so you don't have to mix up new kalk as often.

A calcium reactor on the other hand uses CO2 to lower pH inside of it to dissolve calcium gravel. The CO2 diffuses out of the water after mixing into the tank water, leaving behind just liquid calcium. As such, it's a little more complicated, but can be adjusted to output a very high degree of calcium.

If your calcium draw is low to medium, the kalk reactor will serve your needs. If your calcium draw is extreme, however, it possibly won't be able to keep up.

But as stated, kalk can be used to precipitate phosphate out of the water column. This makes a kalk mixer still useful even if you have a calcium reactor.