I also have one. Been using it for about 2 months now. My TDS
reading of my tap water was 418 and after the RO
it comes out 1. That is really good. Easy to set up and the place is good at support if you need it.
125 Gal-35 Gal Wet/Dry-Tetra-Tec PF500 HOB
(3) AuquaClear 301 Powerheads-600 GPH
Automatic Tempature Controller
5-6 Inch Sand Bed-200+ lbs of LR