Herculean Harvest will lower my water from 6.6 to 5.5 when i use about 60 mls in 2 gallons of water. At that ph your calcium wont get absorbed. Basically since nectar is a calcium based line that means you other nutrients are getting locked out. It uses calcium as a carrier for other molecules like nitrogen, phosphorous, potsssium magnesium ect. To correct this get ph up & down and monitor your water and do a ph test in your soil slurry,to see where your soils sitting at since you don't have a conductivity meter