The black hose pool heater trick is a DIY method to bypass or temporarily disable your pool heater. By using a black garden hose, you can create a bypass loop that redirects water flow without going through the heater. This trick is useful when you want to maintain the normal water circulation in your pool without heating it, or if you need to make repairs to your pool heater. To use the black hose pool heater trick, simply disconnect the inlet and outlet pipes of your pool heater and connect them with the black hose, forming a loop. This allows water to flow directly from the pump to the return pipes without going through the heater. Make sure to properly secure all connections to prevent leaks.