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domino72
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using fox farm soil in 3 gall pot and the runoff in catch trays is reading 2000+ on my truncheon. had to flush until they drained @700-900 ppm. believe i was overwatering annd overfertigating(drip system) pots were heavy and res water was at 800 ppm tap water coming out @ 280 ppm . being that the soil is already fertilized,should there be NO extra fetilizer added to the res?