i would get the biggest that you can afford right now unless you never plan on upgrading to a bigger tank. a 75 GPD system should do just fine for you. try these guys for a good price and great customer service
www.buckeyefieldsupply.com. i met them at a
frag swap last year and i have to say that i was very impressed.
the house water passes through carbon, sediment,
ro membrane, and a deionization chamber. each chamber removes
TDS's from the water and purifies it. all you will need is water into your house, and a Y that screws onto your cold water supply (i use the washing machine supply). it literally takes about 5 minute to install a
RO/DI unit.
a
TDS meter is used to measure Total Disolved Solids in the water coming into and going out of you
RO/DI unit. i say into AND out of because i use a dual
TDS meter (the best ones
IMHO).
