About Those Stinky Rio Pools

…Oh, and I think I know what happened to the Rio pools to cause them to turn green and smell like farts. They crossed the streams…

There are two types of pool chemistries, free chlorine based and ozone/hydrogen peroxide based. I've used both in my pool. But you can't mix the chemicals from the two systems. They dumped hydrogen peroxide into a chlorine pool, knocking out all the free chlorine and the algaecide. Then, in desperation, they added copper sulfate to kill the algae, but the peroxide ate that up and made hydrogen sulfide as a by-product (the fart smell). The copper sulfate is also what turned that bleached blond swimmer's white hair blue-green. They musta dumped in a LOT of it.

So, finally, they did the right thing and drained the pool and started over from scratch.…