Putting Kalk in the ATO?

[ScubaSteve]

Originally Posted by Myka

When you guys add Kalk to the top off water don't you find that the addition of Kalk varies as the evaporation changes? I know my tank is hardly going through any top off water right now, and in the summer it was about 3 gallons per day. That could wreck havoc...?

That has been my concern as well, but I'm going to try it at a low kalk concentration (0.5tsp/gallon) and adjust it accordingly like you would with two-part. I'm going to keep the kalk on the low side and use two part less frequently to dial it in. If I could get two-part down to every other day that'd be enough for me.