- Wassertester: suitable for routine monitoring of pH and levels in swimming pools, spas, and various water sources, pool-ph-meter-tester. Use for regular checks at home, in a spa area, or in community facilities to keep water balanced. - Wasserdetektor: ensures the water balance is correct, otherwise it can affect eye comfort. The pH should neither be too acidic nor too basic for comfort, water-ph-detector. Ideal for maintaining pool or spa water to protect eye comfort. - Tester fuer schwimmbecken: made from ABS material, durable for long-term use, pool-wassertester. Designed for reliable pool testing in daily use, indoors or outdoors. - Spa-ph-meter: not recommended to immerse the detector in water, except in pool- or spa-water, pool-ph-meter-tester. Use with pool or spa water while following immersion guidelines.