Quote Originally Posted by George in Georgia View Post
. . . . I am an inverterate label reader. . . .
Just doing a quick scan through the forum for unanswered threads, and saw your comment, which includes a bit of a misspelling, which I read as

"I am an invertebrate label reader"

My older son does "invertebrate animal husbandry" (ie, he feeds and plays* with the nautiluses and octopuses) at the Tennessee Aquarium, so your post got the "Huh??, better read that again" reaction.

But to your question: Yes, remaining algae can definitely cause high chlorine demand.

PoolDoc



* The official 'PC' term is "enriches", not "plays with".