The water in my tank is about 35 ppm (didnt realise ro resin was spent) does anyone use a 10" clear glass vessell (5 stage ro type) to polish before pump in there van? i have a spare one i could fit, will the pump still work well..IE get a high enough flow rateto clean windows or is there a higher flow through rate on the blue resin bottles? ps i have always transferred to tank 100% pure, so dont have a proper di cannister. thanks.