just filled my tank van 650 litres full and did my usual and checked the water with my tds straight after. yesturday it was at 002ppm so i thought ill buy some more resin for next week,anyway today its at 15ppm and im worried on how it will effect tommorows work. got a whole day of first cleans to do. Will this spot??? im hopeing not as dont want to waste a full tank of water. from now on ill be checking my tds of water daily before i fill. Im just shocked it going up so high over night , surely not normal??