Need Help on RO Unit

[CSUPUEBLOTIM]

Okay all, I am trying to find a RO unit that I would be able to hook up to a faucet and use. Being that I am in college I have to have something that I can just screw onto the faucet and run the water since I can't permentaly install within the plumbing. Any suggestions on a unit that would suit this need would be greatly appreciated. Its only for my weekly water changes on my 12G so nothing extreme is needed. Thanks in advance!

[JetCat USA]

http://www.spectrapure.com/St_fd_valves.htm

scroll down to the bottom, on the right side.

[ihopss]

Look at the filter guys.com.

[mg426]

Those are two good companies to deal with.