Louderanswered grow question 4 years ago Meter's cally'd, every plant gets the same drink. I literally just ran a gallon of 0.5 EC through it and the run-off came out at 1.7 so I think it's either I forgot to rinse the catch dish or some salt build up was coming through...OR I left to dry too much..I think the others need slightly more nutes (but not much?)