Fertilizer levels to nothing in 2 days

St3vO

Member
ok here is my deal i grow in a dwc recirculating system. I put my fert to the right levels 750ppm and within 2 days the fert is down to 50 ppm. Is this a matter of me not fertilizing enough? i am running my advanced nutes at 1/2 strength as i have found running full strength is to much with a reverse osmosis water. any 1 have this prob with fert levels dropping ?
 
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