Best multiple dosing pump

[Johnic]

I plan on going away soon and need to dose my Alk and calc each day while away. I can't rely on my neighbor so I want to setup a doser.
I dose approx 30 ml of Alk and 30 ml of calc each day.

 

[Mr. Wiggles]

I built mine following this thread. It has worked out well and I know that I can source all the necessary parts easily, and you can easily tailor this system to exactly what you need.
http://www.reefcentral.com/forums/showthread.php?t=1773806

 

[Johnic]

I'm looking to dose the exact ml per day. I don't have an controller though. Which doses can do this. ?