I’m looking for a great ph testing probe that is not to much,but is the best one that reads correctly right away an does it in any temperature of the water too! ? I bought one but it is all over the place, tested my well water 9.8 ph and I have ph down, but I have never had to use it; what’s the number of drops in a gallon of water to get it down to 6.5? Better yet what is the most you would put in a gallon of water to get it close to the goldilocks zone?
