Implementing Kalk/2-part solution

Jwheld

New member
I'll start by saying I'm from MN and with the differing seasons upon us evaporation can be unpredictable. I'm currently using Kalk in my ATO water and it is working alright. Just got a few SPS corals so I've been measuring daily to try and figure out usage. I'm quickly finding out that my evaporation seems inconsistent.

To mitigate this, I broke down and bought a dosing pump. So my question is, what is the best way to implement? I do like the added benefits of pH buffering in the Kalk so I wanted to hear potential solutions combining both kalk and 2 part. By my calculations, I'm currently dosing 0.7 tsp Kalk per day by estimating 1 gallon evaporation per day. My demand is slightly higher than this, as I am having to manually dose ~0.2dKH every day.

By my calculations this would be about 1/3 gallon of saturated solution daily plus dosing of 2 part. Would this be a reasonable implementation, or are others dosing less of the saturated Kalk solution and more of the 2 part?

My system is a 40B with 20L sump. Estimated 50 gallons of water. With the current ATO/Kalk setup my pH is staying 8.15-8.3 (salifert) from before the lights turn on to before the lights turn off in the evening.

Any suggests would be appreciated! Still new to the hobby (8 months) and slowly upgrading as I grow into the tank.
 
When I started 2 part, I stopped kalk in my ATO. My evap rate varies to much to use both.


You can always use baked baking soda(sodium carbonate) as your ALK part which will also raise your PH slightly, instead of using both.
 
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