General HydroponicspH Test Kit - PTK500

Great for determining the PH of my water used for gardening.

Love these drops. I use a quarter vile with one drop and it's always been very accurate and easy to read. TONS better than cheap meters or litmus paper. I've done like two hundred tests with my little vile and got like a thousand left.

Showed up a wk early and was exactly what it was supposed to be...

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