ATO switch between Kalk and RO

[reefkeeps]

I currently use Kalk water for all of my top off, I would like to switch between RO water in the day time and Kalk at night. I don't really want to use two top off systems.... Rather I would like to use a couple of Ts and turn on one line and turn off another via the apex. Does anyone know of a good way to shut off an 1/4 inch connection using the apex?


I don't know that it matters but I use the spectrapure Ultra-Precise Auto Top-Off.

 

[CJO]

You could use two solenoids, but it might be cheaper just to use two pumps.

CJ