Calcium and Kalkwasser Reactors

Calcium Reactors help maintain alkalinity and calcium levels (among other trace elements) by dissolving a media called aragonite. When the aragonite is dissolved it then drips back into the tank to assist in proper water chemistry. They are highly effective, almost self sustaining products, that make 2-part dosing obsolete. On average a good reactor package will run about what a year of dosing additives do in our experience. For more information on Calcium Reactors please refer to our Reef101 section.

We currently carry AquaMaxx, Bubble Magus, Korallin, Reef Octopus, Aqua Excel and Skimz - in both just the reactor and several package variations. If you do not see a specific model you are looking for please contact us. If you would like assistance choosing a calcium reactor, as the lists are extremely extensive, email us at