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Digital LCD Display PH CO2 Controller Meter Aquarium Fish Tank 0.00~14.00PH Range + Switched Socket 110V / 220V
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Jieotwice Digital PH Controller PH Controller Regulator PH Monitor Water Quality Meter CO2 Regulator Relay Control Suitable for Ponds/Aquariums/Wine Production AC 100-240V PH-201 : Amazon.co.uk: DIY & Tools
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