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I have an inground pool with a Hayward C110 filter and a jandy valve that can adjust between the skimmer and vacuum. everything was fine until two weeks ago when I noticed air bleeding into the system (air was coming out the return vents). I narrowed it down to the vacuum side. When I use the...

Hi: If I shock my pool, 15 - 19ppm, Can I still swim in the water? My CC is 0.5 and I want to shock the pool with bleach. How long do I have to wait after adding the bleach before I can swim? Is there a maximum number ,ppm, where it is not safe to swim?

Hi, I just bought a house with a built in pool made with fibertek? with tile on the top(16000 gal). The previous owner was using chlorine in puck form with a floating dispenser. He was shocking the water every week with 2.5 gallons of liquid chlorine. I tested the water before adding the...