Hi guys doing my first cannabis guerilla grow, I have one problem my sites does not have any buildings so no water, but it does have a local reservoir might have a few fish in there, will this be suitable for my plants, I was going to use that for watering my plants, and just bring my PH pen and PH Down along with me and add neuts to that water from the reservoir would this be ok ? also the soil at the site is very tuff, my friend says there is some hand held tool which has a circle at the bottom and you push it into the ground, and pull it up and it takes a chunk of the soil out, anyone know what this device is called many thanks ?