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- Commonly used in aquariums, swimming pools, spas and other industries.
- Quantity: 50pcs/box
- Nitrate range: 0-200 mg/l
- Nitrite range: 0-10 mg/l
- PH range: 6.0-9.0
- Carbonate hardness range: 0-240 mg/l
- General range of hardness: 0-180 mg/l
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