johnb1963
New member
Hello My Friends, I have been using the typical PH Pens, from Amazon, they range from $10 - $15, but they only last one grow, if i'm lucky. what are you guys using? I'd sure like to find a good reliable tool, that will last several years. PH is probably the most important part of growing, so would it be better to spend the $15, for every grow, or spend hundreds on one that may last years?