Ok, just checked the chlorine with the OTO drops and looks more like dark yellow with tint of orange so about 13ppm. with this big drop I added a 121oz jug of bleach. I am actually finally seeing an improvement. Will check again in several hours. Staying out of the pool until I can get a true reading though for safety. Just so glad to see the improvement. can see the bottom better. I do see sediment on bottom and will have to find a way to vacuum for sure tomorrow.