Pour it into a measuring cup...dump it into the tank.
Dosing pumps complicate the matter since you have to adjust them to add the right amount at the right time.
Just measure your levels, use the link below to calculate how much to add, measure it out, add it, and repeat. I recommend getting your levels to a good spot, don't do anything for 4+ days, then retest. Find out how much you need to dose (say 200ml), then divide that amount by 4 days. The result is your daily dosing requirement (50ml as the example.)
http://reef.diesyst.com/flashcalc/flashcalc.htmlYou could also use a gravity-feed system like they do at hospitals, but the alkalinity supplements will clog them fast. They're ok, but I'd still to a nice dosing pump or manual before a gravity system.
Edited by ReefdUp - November 22 2013 at 4:08pm