I've tried searching on the site here, with not much luck. I realize you get what you pay for, so I'm willing to drop some cash on a good model. I plan on having a total of 12 plants (3 flowering, 3 vegging, 3 clones, and 3 mothers) Soil grown. There's a possibility I may become a caregiver for up to 4 other patients. If I did this I'd be dealing with a hydro system for up to 60 plants. I want a PH tester that'll work well for either scenario. Thanks for any suggestions folks!