I have a solar hot water shower with LP Gas backup, yet very few people use it before they jump into the pool.
To recover the chemistry after a big party it takes two shocks, an extra three pounds of chlorine, several backwashes over about five days before normal returns.
I won't use a public swimming pool.
Yes, all true. Reminds of something W.C. Fields once said: “I don’t drink water because fish f*** in it.”