5 Things to Know About Shocking a Green Pool

Shocking a green pool works without draining Add a heavy dose of calcium hypochlorite granules, run the pump 24/7, and brush aggressively. The shock kills algae, and your filter catches the dead debris over several days.

You will need to clean the filter repeatedly Dead algae clogs filters fast. Expect to backwash or clean the filter multiple times during the process.

Test and adjust pool chemistry first High pH or low chlorine stabilizer makes shock useless. Adjust pH to 7.2–7.4 and check cyanuric acid levels before adding shock.

High cyanuric acid may force a partial drain If stabilizer levels are too high, shocking won’t work effectively. In that case, draining part of the water is the better option.

Draining risks liner damage and structural issues Shocking and scrubbing is almost always worth trying first. It avoids the hassle and potential damage of draining, but don’t expect overnight results.