I added my re~dose on Sunday. Prior to I drained the water to low on the skimmer figuring it would rain and bump it up a tad, but knew if it didn't and evaporated I could top off with the hose. Today it rained (and tornado~ed), and it rained a boatload. I just checked because the rain finally stopped so I wanted to run the filter. I am filled almost to the rim, inches over the top of my skimmer. I am letting it ride a bit so all that I have added (via pantyhose in front of return method) dissolves in the water. Not sure what others would do, but I feel it's important to let what I have in there dissolve properly and try to get a reading, opposed to not knowing what is in there, draining and not being able to test because it hasn't been a week and putting more in.
I am Pittsburgh area ~ tomorrow it is to clear for the weekend ~ another drop of rain and it will be draining itself but I am going to just ride the tide and allow what I have in there to dissolve and circulate. I am not being cheap not wanting to spend 15 bucks for more ~ it's just I don't want to get too much in there and have to maintain higher chlorine levels to maintain and ungodly amounts should something take hold.
I'll follow along here to see what others tell you, but wanted to share my line of thinking.
I am ready to build the Ark ~ all the hammering though would surely vibrate waters out of my too full pool though.