I'm looking for an RO system that can produce around 200 GPD; store it in a tank somewhere between 200-400 gallons; and pump it to a room one floor up as well as another room on the same floor. Not really sure if the pressure out of the RO system is high enough to push the water to the floor above (like a hot water heater). Our base water isn't too bad but i'm looking at fishes that prefer gh around 0-1 and kh near 0. I know you can buy an 'ro' unit at various stores for not too much that can do 200 GPD but i can't seem to find the entire system. Also can anything useful be done with the waste water ?