a tsp of mirical grow 15-30-15 in a gal of water will give a diffrent ppm than a tsp of Jacks 15-30-15 because thay use diffirent chems for n-p-k. skip the snake oil adds and just grow good DNA WITH BASIC NUTES.after 3 or 4 growschange/add one thing and see what happens .I LIKE GENRAL hydros maxibloom with promix hp for flowering