Superchlorinating via the SWG is possible, but will reduce the cell life, as jonv112 pointed out. You can use plain, unscented bleach--in a 22K gallon pool, approx. 1/2 gallon of 6% bleach will raise yourCl by 1 ppm. With a CYA of 10, your shock level is around 12 ppm. So test your current cl level, then add the amount of bleach necessary to get up to 12. Also, keep your pump/filter on 24/7, and it should help clear up the cloudiness if it's "stuff" suspended that's the problem.

To increase your CYA, go to Walmart/Home Depot/Lowe's/Poolstore and buy it--it's often also called stabilizer, conditioner, balancer, but if the ingredient is isocyanuric or cyanuric acid, it's the stuff. Follow label directions for how much to add to up your level to where you want it, but don't broadcast it into the pool like the label says.....most of us pour it into the skimmer, where it goes to the filter and dissolves SLOWLY--so don't backwash or re-test for a week or so to give it time to totally dissolve.

Janet