Just a trivial question, which I'm asking out of curiousity.
Does the overnight chlorine drop test REALLY have to be done overnight? Can the test be faked out if you have an automatic cover?
I've never been UNDER my pool's cover (by design, of course), so I can't say for sure if it's 100% opaque. But it's a very heavy vinyl, darkish blue, and almost always has a layer of dirt covering the whole thing (cleaning it is my least favorite thing in the world). Avoiding direct sunlight is key to the process, right? Does a pool with such a cover meet this? If so, how many hours of being covered would constitute a valid test period?
Just thinkin' out loud here...