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X2SR is a remote Wi-Fi water change system. The user can remotely control it through the mobile phone app. The user can use the X2SR to automatically change water in their own sea or fresh water tanks at a fixed time and quantity. The automatic water replenishment function can be completed through the submersible pump. In response to possible overflow risks, the X2SR is equipped with anti-overflow sensor. When the water level reaches the anti-overflow sensor, an alarm will trigger and the water supply and change will stop. X2SR is equipped with two stepper peristaltic pumps which can be used continuously for a long time.