I was dropping cards last ***ht and walked round the corner and saw a waterfed pole and a RO DI 100gpd system lying on the ground. The pole was just what I was looking for a light 12 footer to complement my 30 foot pole. I have only just moved over the WFP system last week and the water purifier was exactly the same as MINE... It was all green with algae but I just removed the filters and also now have a spare DI canister. But best of all I now have a second 100gpd filter. So if anyone knows how to upgrade a 100GPD system to a 200 GPD then any help would be appreciated.