Watering a Ten Footer

Are their drip irrigation systems out there that'll do the job or something similar or does it have to be by hand? I ask because I heard that a ten footer requires 50 gallons of water every other day. For that matter how do you PH the water? Collect it in a reservoir first right then pump it through the drip system or whatever? Who sells these reservoir's as I am having a problem finding a drip system that includes one in the starter kit.

Eh, I've got plants over 10 foot and I give them ... whats the term for hosewater again ? I give them 40-50g of Dihydrogen Monoxide fresh from the tap once a week and 40-50ish gallons once a week. I was using dip lines at first but now I just go out and water individually... also my mixing tank is a horse trough.