I have tried a few different brands of RO units over the last few years, and I have to say I am bar far most pleased with my Spectrapure unit. I have a 160gpd unit and it is performing very well. I have a source water with a TDS of about 400+ppm, and it gets it down to 4-5ppm. They seem to be good quality and they are reasonably priced. Zack ------------------------------------------------------------------------- This is the apistogramma mailing list, apisto@listbox.com. For instructions on how to subscribe or unsubscribe or get help, email apisto-request@listbox.com. apisto-digest@listbox.com also available. Web archives at http://lists.thekrib.com/apisto Trading at http://blox.dropship.org/mailman/listinfo/apisto_trader