My pool man agreed that we should give it a shot. I had some 30 percent peroxide product left around from a previous project, so I put 3 gallons of the concentrated hydrogen peroxide in the water.

But Richardson said that hydrogen peroxide — an antiseptic that kills bacteria — is not used in pools, as far as she is aware. Though Richardson isn't involved with the pool maintenance in Rio ...

RIO DE JANEIRO (AP) — Olympic officials gave up on cleaning the green-tinged water in one of the pools at the Maria Lenk Aquatics Center. Instead, they began draining it Saturday and planned … ...

Hydrogen peroxide is an appropriate pool-cleaning tool, but not when combined with chlorine, Gustavo Nascimiento, director of venue management for the Rio Olympics, said at the conference.

Hydrogen peroxide is a de-chlorinating agent, which means it undoes what chlorine is supposed to do — kill germs and keep water clear. That could explain the murkiness that resulted, and, as the ...