more than not when there is a build up of nutes people try to add more ferts to it to level it but it just throws off the ph more and clogs it up they will be good without food, before you harvest you actually dont feed the plant for a week or two and tell me what epsom salts do in dirt i have no experience with that, i crush it up then dissolve it in water, if you dont do it properly it will reduce the amount of nutrient intake because the tiny crystals that arent dissolved clog the little pores i generally put it into my system every 4th time i change the water with no problems thus far i might wanna try soil tho someday... never know

low ph turns plants pale green this is because it locks out the nitrogen
high ph causes build up of salts some of which can be deadly

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