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Vermiculite is a mineral composed of flakes that can range in size from very tiny to quite large. Nu..
The indicator paper set with distinct color PH scale from 1 to 14 for result comparisons: 1-3 indic..
This digital pen style pH meter is an ideal instrument for soil, drinking water, aquarium, swimmin..
Ideal for commercial use. Includes a carrying case with belt clip. Highly efficient and accurate ..