I had a gallon of 10 percent algaecide dumped in pool is it safe to swim in?

Pool algaecide is a chemical used to kill algae that can grow in swimming pools. It is important to follow the manufacturer's instructions for use when adding algaecide to a swimming pool. Incorrect application or overdosing can result in potential health risks, including eye and skin irritation, respiratory problems, and stomach upset if swallowed.

While algaecide is generally considered safe for use in swimming pools, the safety of a pool after algaecide has been added depends on the type of algaecide used, the concentration, and the specific pool conditions. Some algaecides may leave behind harmful residues or can create disinfection byproducts that can pose health risks.

It's important to ensure that the pool has been properly ventilated, the algaecide has been circulated sufficiently, and the water has been tested to ensure that it meets safe levels for swimming before allowing anyone to swim in the pool. If you are unsure about the safety of the pool, it's best to avoid swimming until the pool water has been tested by a qualified pool professional.