let me re phrase that. I turned off the drippers. the air stone runs continuously. The res temp is 74. I was only running my nutes at half power. the water is from a water store. meant for drinking. too much salt maybe? switch water to what source? my tap is at around a ph of 6.5 and ppm between 500-700 depending on time of day. should i use that instead of the water store water? what should my ppm be at?