a 3 channel dosing pump(like Profilux, has timer built in) or 3 single channel dosing pumps along with some sort of timer to shut it on and off(preferably a digital one where you could make smaller increments than say the push pin type), large enough containers to pump out of(I just use 1 gallon milk jugs, but some use 5 gallon buckets) and of course the ingredients to make your own solutions, I use Bulk Reef Supply. Hope this helps, we have a couple of people in the club that use the pumps and timers, I still do nightly dosing manually. Have a good one.
Matt