I use tom's aqualifters for dosing and they work great. I have my fert bottles (1 gallon water bottles) in the stand and its about 4 feet from the bottle to the top of the tank.
Here's a crappy pic of my set up
The way it's set up is:
airline tube is ran from the bottle into the aqua lifter, then out into the tank, I have the ends of the airline tube ziptied to my lily pipe so that when the ferts are dosed, they drip into the tank. Make sure not to have the ends of the tubes under water since this will cause a siphon.
I set up my fert bottles so that I get about 2 weeks of dosing out of them, (i fill it up with DI water, and add 2 weeks of macros and micros to each bottle. I use kno3, kso3, k2po4 (i think) for macros, and csm+B and excel in my micros) I know for some people when they mix up a large solution of micros, it grows some weird white stuff after a few days, but I haven't noticed it. I think the excel and the DI water(being sterile) helps with this)
Then I time how long it takes the aqualifters to pump 1/14th of the 1 gallon bottle into the tank (in my case it takes about 4-5 minutes). Then I set the timers to turn on in the morning for 5 minutes. 2 weeks later when the bottles are empty (or close to empty) I just refill them.
Oh, and when I'm timing it to see how long it'd take, i do this with just water and not the ferts solution.
Hope this helps, if you have any questions feel free to ask! It's REALLY freed me up from dosing, since I'm not home a lot I don't have to worry about my plants not receiving their ferts