I tested my water and the cya level was at 25. I added half a gallon of liquid stabilizer waited 24 hours and now cya is much lower. I can fill the whole tube and still see the black dot. Tested a second time this morning after 12 mire hours with the same result, tube full and the black dot is still visible. Any idea what is going on?
I am taking a sample to the pool store to double check my test.