Water temperature should not exceed 40 ℃. This pump is intended for use with water only! 2x JT - 500 DC 12V Pump. noise is small, 10CM is less than 35dB. when connecting the power note the negative and positive, otherwise the impact of head flow, brown lines connected to the positive electrode, the blue line is connected to the anode, yellow line don‘t need to be connected.
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