I have a 4 stage RO/DI 100 GPD that I have order from wateranywere.com
http://wateranywhere.com/Virtual/Vir...irectoryCode=~
I have order it in part and it have cost me 80$ US. but you have to assemble it. I have see that they double the price of there membrane I have pay mine 25$ for 100 GPD they are now 50$ :(
For the DI I have order a bulk for 100$ US and it is goog for 28-30 refil so I have enought for the next 30 years it is the MB1 mixed bed resin
http://www.resindepot.com/page20.html
I have see that SWC cary resin at good price to if you dont want to buy a full bulk
For the TDS meter I have bought a Dual Inline TDS Monitor (Measures BOTH In & Out) from aquarium pro.ca 59.99$ can.and I realy recomend it over a handled model
http://aquariumpros.ca/Merchant2/merchant.mvc?Screen=CTGY&Store_Code=A&Category_Cod e=RA
[ 24 September 2002, 21:09: Message edited by: stephane ]