I agree but I tested it 3-4 times with the same result. 10ml, 10 drops and 3 drops. drop and wiping between till it goes, and stays blueish.It was not possible to have that much lower CH in your pool vs your fill water unless you drained over half the pool and filled it with rain water.
There is a testing error somewhere.
Filled mid February, normal spring rain (last night 8" but I haven't tested today)How long since you last filled?
Lots of rain?
Yeah, that's not the usual case at all...
I believe it has by volume OR by weightPool math tells me to add 14lbs of calcium. On a scale 32 oz in a measuring cup weighs ~1lbs. So do I add 14-32oz cup full? Or 7 cups full? This is a huge variance?