Grow Gadgets pH Tester Pen Media The combination of the two

The combination of the two ensures that all bases are covered

Unlike a typical thermostatic set-up

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it can only increase humidity to the correct levels but it cannot reduce humidity levels to bring them within range

It’s a waste of precious nutrients and does nothing for your plants

Grow Gadgets pH Tester Pen Media The combination of the twoThe 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