Hey all, i am new to WFP pole and just got my system up running. Using a tank with rainwater (10-30 ppm), hydropower 6 ltr DI vessel and 100 metre minibore hose. Water is 000 when measuring just after the DI, but at the end of the brush, it goes from 1-6. I have flushed it with around 300 liters. How long time Will it take for the Tds to go 000 permanent?