Last week just over 4 hours and almost 20 gallons of water I got the runoff to 6.2-6.5 and 920-980 for 2 runoffs. Was running 4100 PPM and 5.0 PH. You can see the burn but after the flush dry and refeed have some new growth and looks to be back on track. with 1250 PPM and 6.5 PH runoff. Remember with Fox Farms to Feed Water Feed Water otherwise, you get a 4100PPM runoff. 4 weeks until I need to chop.