If this is mainly peat moss grow, your ph is set for soil at 6.5 soiless grows need 5.8 ph. Feed chart, week 1 autos, 200 ppm .04 ec. Photo period 400 ppm 0.8 ec. Increase 100 ppm every week when seeing good growth. Stop at 600 to 650 for autos and 800 ppm for photos. This is their max feed. Should have been there on the 5th week, but I think the ph has slowed you down.