Because you have over chlorinated the pool. You will never get that stuff out of your pool and the first person who swims in it will have their clothes eaten off of them, they will have a severe rash on their skin, and their hair will turn green, whatever hasn't fallen out. Pool chemistry is a science, you just don't dump and dump until you see an effect. What is the PH of the pool? How much acid have you added? What is your alkalinity? What is your calcium hardness? Your chlorine has two readings: free chlorine (FC) and combined chlorine (CC). Free chlorine refers to the chlorine that is free and available to kill. Combined chlorine is chlorine that has done its job.
In my area, chlorine costs about $5 a gallon. So far, you have spend $120 on chlorine whether it needs it or not. I hired a pool guy who charged me $50 for a one time service, and told me exactly what to do, and how much chemicals to add. As said before, you can also grab a quart of pool water and go to your local pool supply company, and they will test the water.
My advice is to first clean that filter, so you don't burn up the pump. A pump motor will cost you ~$450, and that is provided you do not burn up the impeller. If you fry your pump assembly, expect to pay at least ~$1k to repair the damage. This is why you need to stop with the chlorine and get it analyzed before anything else.
I also want to avoid trying to tell you exactly what valve does what. One wrong move and you will cause your filter to explode, or burn out the pump. Someone has to be on site to verify what Jandy valve does what.
Please understand that I am not a mean old coot and trying to yell at you. I just don't want to waste your money for something that is not needed.