Jack asks “Can I run soft water after I run it through a 3 stage filter? Does the three filter system remove the salt from the soft water softener? I’m on a well and do not have chlorine.”
Great to hear from you, use a digital EC tester for measuring salt content. EC measures the level of fertilizer salts in the water. Most marijuana strains are happiest when grown at an EC of between 1.5 and 1.8.