Best way to avoid a Kalk over dose?

[chaostactics]

So im going set up my kalk reactor and want to avoid an OD. I dont want to lose my ATO abilities if my pH goes too high. So normally ATO vessel, to kalk reactor, to sump. But i want to set up a way to have water bypass the Kalk reactor if my tank pH climbs to high (as determined by an Apex).



How do i do this? simply, cheaply, and reliably (i know sometimes you have to pick just two of factors.



Im guessing something with a solenoid? Two pumps for water supply? What?

 

[Ranjib]

Use cheap doser , like Jebao , or build a doser

 

[laverda]

Use solonids to rout you ATO to the kalk or to by pass it. Or you could have 2 seperate ATO pumps.

 

[jent]

I have had issues with kalk through my ato causing alk swings when it gets dry. My solution is to stop dosing kalk from the ato and to have a separate reservoir that is saturated and the dos provides a regular daily amount from.

Time will tell if I like this, if not I may just go two part but need another dosing head to do that (other head is used for carbon right now). Since I already carbon dose a little, I might add some vinegar in order to get a more saturated concentration before going two part.