First opening with BBB, initial results (TF-100):
Water was very clear but there was a "dust" on the bottom so decided to shock. Added 11/2 gals 12.5%, added 4 lbs of baking soda.
Water is sparkling clear, everything seems well.
I'm just wondering about the speed that the CL fell. Normally, my CL loss never exceeds 4 ppm per day, but I was down from 15 to 6 in 12 hrs.
Does CL dissipate by % as opposed to the same amount of points no matter what the initial reading is?