[untamed]

I've been running this Kalk reactor for a few weeks now. I modified it by adding two ball valves, which enables me to service that pump without draining the whole thing first.


The pump that is attached to the Kalk reactor is programmed to mix the Kalk for 7 seconds every 2nd day.

Like my Ca Reactor, the Kalk reactor is controlled by the Aquatronica and an Omega peristaltic pump. This pump is smaller than the Ca Reactor pump, because I knew that I can never drive this pump MORE than my evaporation rate. Evaporation will continue to be replaced by the sump float switch and is completely independent of the Kalk reactor.


I'm bringing the Kalk reactor on-line very slowly. Right now, it runs from 11PM to Noon, but it is only pumping a very small amount of Kalk. As my Ca/Alk demand starts to increase (coral growth), I will increase the amount of Kalk rather than increase the Ca Reactor output. The reason is that I'm trying to use the Kalk to minimize the daily pH swing that the tank goes through.

Each evening, as soon as the lights go out, the tank pH begins to fall. As Kalk has a very high pH, I hope that it will stabilize this fall as I add increase the Kalk output. Here's what the daily pH cycle looks like right now.