CLEVELAND, Oh. (WAVE) - Pool chemicals are in high demand this summer, and it’s important people know how to safely use them. If mixed the wrong way, you could get hurt. “There are some shortages in the supply chain and there may not be as many chemicals available, and people still want to use their pool. People are doing some creative things or making some home grown brews or mixing different chemicals, that is extremely dangerous and something that should be avoided,” said Baruch Fertel, MD, emergency medicine physician for Cleveland Clinic.