Review on VIVOSUN 0 05Ph Accuracy Readout Temperature by Wagner Witlin

I bought these specifically for ppm and ph tracking and they work great! I use them for exotic gardening and it's extremely important to keep track of these things. I tested both pens, but I use the pH pens every day to make sure I'm getting the right nutrient intake. I'll use another paddock when it's time to flush before harvest! Some people forgo it, but I think they lose productivity as a result. Paying attention to all of these details is important to maximize potential. I don't have to pay a lot of money for an expensive tester, so these are ideal solutions! This is a must have for any gardener and I like to think of it as insurance. If they are not used, a small mistake can become very expensive! Due to the low price, I recommend everyone to buy them to be safe and not regret it. ADVANTAGES: * Very easy to use and calibrate * Separate sleeves for each pen * Low cost * High accuracy CONS: * Batteries in a pen don't last long