Quote Originally Posted by JimD
What time of day are those readings from? Whats it at at night?
Good point - these readings are typically when I get home from work at around 7:00pm.

I think I am a little bass akwards on my Kalk timing. I let the Kalk mix overnight and settle for 3+ hours before the top-off system comes on in the morning and then remains on all day. First thing in the morning the tank gets a healthy dose of Kalk water, and PH gets a healthy boost, but not extreem (maybe 0.1 at most), and the top off is throttled back so the RO/DI has to refill it before the pump can kick on again. Probably takes 2-3 hours for all the evening evaporation to be topped off.

Evaporation is good, and increasing now due to weather (AC runnning more). I have a Dehumidifier that I dump about 3/4 gallon out of twice a day :o