So you just refilled your calcium reactor with a big jar of aragonite, cleaned out the lines, turned it on and it is going great! The water is coming in and out just like clockwork. Your CO2 that you are running is perfectly entering into your calcium reactor to help break down the aragonite. So what do you do now? Dose your tank with calcium! But you just did all this work to make your calcium levels high! Why do should you have to dose now!?
Because it takes your calcium reactor a few weeks before it can really start to break down the aragonite to make the calcium. So if you want to keep your tank running smooth, pour in some liquid calcium or a solution that contains calcium to bring up your levels. Your corals and clams will thank you for it. We strongly recommend using a calcium reactor in The Reef Aquarium DVD, A Set Up & Maintenance Guide as this will make it easier on you, and over time save you money on chemicals.

