does anyone no were to get an RO unit cheap because i dont have enough enough money to buy one. and i dont think petsmart has one.(petsmart is my only lfs)
Do some poking around on www.aquaticeco.com They offer several sizes at various prices.
Also, after looking at your other thread just now.... you don't really NEED RO if you are doing a fish only set up. You can switch over to RO later on if you are going to start down the road of coral and other sensative creatures that would need RO.
as said in the other thread you can buy water from stores, but if you add up all the cost of water through one month, and then a year, it pays to make your own lol. My 6 stage dual DI was purchased from www.thefilterguys.biz and that makes around 40 GPD. They carry cheaper units i think around 120 bucks for a 2-3 stage.