Once again Hi all
Since the last time i posted I received my test kit, used pool math and got my pool clear. However along came a windstorm that filled my pool with dirt, leaves, and trash. I began manually vacuuming it out and got everything out in the process of cleaning the filters the nut that holds the clamp on the filter striped and left me with a non working filter for a few days. I tested the water yesterday with the TF-100 and was completely confused by the results. I dint record the results because i frankly didn't believe them due to a cya reading of 0. I added enough chlorine to get the fc to 15ppm over night the water went from green to grayish. Today I went back and tested the water and found that I no longer had any FC it was at 1ppm. Im guessing either sunlight or the algae ate it up. I waited for the sun to go down and added 2 jugs of chlorine then waited a few hours and tested the water here are the results.
CYA=0 -------- I filled the tube up to the top and could still see the black dot water was not cloudy.
Now my results a 4 months ago were
Is it possible for the cya to go down to 0 i have not drained any of the water. Any advice would help guys thanks.