High Quality 5m pH Alkaline Acid Test Paper Water Litmus Testing For Gardening Aquarium Plant

High Quality 5m pH Alkaline Acid Test Paper Water Litmus Testing For Gardening Aquarium Plant

Scale Reads From 1 to 14: 1 - 3 indicates a very acidic substance 4 - 6 indicates an acidic substance 7 indicates neutral 8 - 11 indicates...

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