Going Great just one small question

I have my temp regulated at 77-80 degrees, Iam watering with a hydroponic drip that does its thing three times a day, my ph is adjusted to 5.9.....6.0,
My only question is the ec level what allows you to control the ec level in your grow tank....by the way iam using a 12 stage RO water unit to draw my water........I only ask because iam begging to notice some salt deposits around the edge of my pot brim....

If I'm correct, the EC reading of your water determines how well the water can conduct electricity. So, having said that, depending on how much "salt fertilizers" you dissolve in the water will affect the electrical conductivity of your water. It pertains to your ppm measurement of nute levels