Tomoko Schum
New member
I have had it lower than 10 in the past. However, the rejection rate is 90% with a 100GPD membrane and 10 out of 134 is actually right on considering the accuracy of hand held TDS meters.
As long as DI resin gets TDS reading down to zero, I don't care if it's 10 or 2.68 (with 98% rejection rate of 75GPD membrane.) 10 would make DI resin to go out a bit faster, but I am afraid that DI resin will be used up faster by CO2 in Madison water (40 to 80 ppm at times) anyways.
Tomoko
As long as DI resin gets TDS reading down to zero, I don't care if it's 10 or 2.68 (with 98% rejection rate of 75GPD membrane.) 10 would make DI resin to go out a bit faster, but I am afraid that DI resin will be used up faster by CO2 in Madison water (40 to 80 ppm at times) anyways.
Tomoko
