✅ Refill pack for manual pool water testers – includes 50 tablets for free chlorine (DPD1) and 50 tablets for pH measurement (phenol red) in easy-to-use blister packaging 🧪 Chlorine testing range: high-resolution 0.1–1.0 mg/L and standard range 0.5–6.0 mg/L 🌡️ pH testing range: precise detection between 6.8 and 8.2 ⚠️ Only suitable for manual color comparators (shaker testers) – not for use in digital or photometric testers 📊 Dual-function refill (chlorine + pH) – ideal for routine water quality checks in swimming pools, hot tubs, and aquariums 💶 Cost-effective refill pack – 100 tablets in total, packed in moisture-resistant blisters for long shelf life
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