Grow Gadgets pH Tester Pen Beneficial Inoculants Ozone is the same O2

Ozone is the same O2 molecule but with a extra oxygen atom

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Grow Gadgets pH Tester Pen Beneficial Inoculants Ozone is the same O2The Grow Gadgets pH tester represents amazing value for money. It's ideal for those on a tight budget or to keep around as a spare. How the Grow Gadgets pH Tester Works Different nutrients are absorbed in different ways at different pH levels. For this reason, it's very important that your nutrient solution is maintained to sit within optimal pH ranges, otherwise you'll encounter deficiencies that will stress your plants and stunt their growth. Use