Osmolator for kalk top off?

[Gatorbait]

I would like to start adding Kalk to my top-off but I only want it to run at night to minimize the PH swing. Would it be possible to program my Apex to only switch on the osmo at say 11pm and off again at around 11am?
Would it be hard on it or decrease the life of the osmo to switch it on and off daily? Would it have too hard of a time playing catch up to the 12 hours it was off?
I currently have an Elos 160 (145 gallons) with a 20 gallon top off container, and I usually need @ 1 gallon of top-off a day. I'm just trying to creatively use the equipment I have without needing to buy more. I would also program the Apex to shut off if the PH went too high.

 

[rvitko]

I see two issues.

1) The pump will have a shortened life, the high pH as well as any slurry will damage the pump over time.

2) When the osmolator does come on, it will add a lot, making a pH swing very likely, if it ran normally and added very small amounts all day, you would see hardly any pH swing. I used to have a 120 with the osmolator and 5074 Calcium Dispenser and I ran a traditional CO2 based calcium reactor with a pH controller. The kalk never raised the pH more than .10 at any time as so little was added at any one time. Combined with some free CO2 from a calcium reactor the pH is very stable and flat after a couple months of tweaking the CO2 and building up the buffering.