Thanks...just got home and changed res... The bluelab truncheon meter reads ec and ppm on two different scales 500 and 700 whatever that means??? Tested water and no reading on meter....after using 3 mils per gallon x15 gallon res of micro...2 mils per gallon gro....3 mils per gallon bloom., 20 mils per gallon diamond nector ....1 tsp per gallon calmag plus..The meter light is on the CF=14.....ecx700 is 980ppm and ecx500 is 700 andec is1.4 am I allright????