DIY RO Unit (inexpensive option?)

[MicroTankin]

How would something like this work...
http://www.bigalsonline.com/Fish_Hi-...tml?tc=default
I am just trying to research all my options before I add water to my system.

[Aquattro]

You could use that, it's essentially a DI unit. You can also recharge them (really messy). Your water is pretty high in TDS, so you'd have to recharge more often than say, me, but it would work. But, that price is already half way to the ebay one....