THE WATER IM PUTTING IN MY RES. IS 55 PPM AFTER I ADJUST PH TO 5.5. I CAN CHECK IT IN 4 HOURS AND ITS INCREASED TO OVER 1000 PPM WITH OUT PUTTING ANY NUTES. IN THATS JUST THE PURE WATER I PUT IN BEFORE AT 55 PPM ?? HOW IS IT INCREASING, SYSTEM CONSIST OF 2 FULL 2 1/2 FT. FEMALES 3 1/2 WEEKS INTO BLOOM UNDER A 400WT HPS GOOD VENTILATION AND CO2 , VERY HEALTHY LOOKING PLANTS, PLEASE HELP I NEED TO FEED NUTE'S BUT DONT WANT A TOXIC PPM LEVEL ?