Heating rod must integral immersion underwater use!!! If you want to leave the water, please disconnect it for more than half an hour and take it out after the temperature cools.

When changing water, do not expose the rod body to the water surface to avoid excessive temperature difference cracking or damage. If the temperature of the rod body and the cylinder is too high in winter, please immerse the rod body into the water first, after the temperature of the rod body is basically the same as the water temperature, it can be powered on to avoid damage or affect the service life.

Heating rod please use it vertically or at a 45-degree angle to avoid horizontal, inverted, or bottom contact with glass or gravel.