Calcium Reactors ???

[Skimmerking]

Steve Im constantly using more CAL then I am with Alk. my ALk is staying at 8.8 and my CAl is 370 could be alot higher like 400 thou, but remember that when dosing Kalk for a long period of time you are not getting the magnesuim too with a Cal Reactor you are maintaining the Magnesuim. so you ahv a tbest of both worlds.

Originally Posted by sphelps

neither a Ca reactor or a Kalk reactor will add a perfectly balanced amount of both Ca and Alk.

Calcium reactors increase alkalinity more than calcium and as a result you'll probably always find yourself having to dose a calcium additive or maintain a higher than normal alkalinity.

With Kalkwasser or Calcium Hydroxide it's the opposite. It will increase calcium more than alkalinity. So when using Kalk you'll likely always find yourself having to add a buffer to maintain your alkalinity. However calcium hydroxide does not directly add carbonate, it adds hydroxide which is not used by corals. The hydroxide however will react instantly with carbon dioxide to form carbonate. This is why many people using Kalk will have a difference in opinion on how much it is actually buffing their water.

For these reasons many of us believe the obvious solution would be to run both systems, however this will probably only work for a high demand system and could be difficult to tune to your tank's requirements. The obvious solution to me would be to use neither and employ a system which adds the exact amount of each in a balanced amount to meet your system requirements.