Adding a gallon of bleach is only raising your FC by 8 ppm. If you look at my post #6 in this thread, your shock level with CYA of 50 is 15-18 ppm, sustained until you can go overnight without losing any chlorine overnight. This requires testing in the evening and again in the morning. If you let the chlorine levels come back down before then, you're not going to clear up the algae that I'm sure is trying to grow, and will have a cloudy pool all summer. You say you added a gallon of bleach to "shock it more"--what chlorine level did you start with before adding the bleach? If you're not testing the water, and maintaining the high chlorine level, it's not going to clear. Fixing water problems isn't an overnight project--it takes awhile for the water to get in the shape it's in, and it usually won't fix overnight.

You can drain/refill water if you want to, but if you continue to improperly chlorinate it, you're going to end up with cloudy water again. Do you have a working gauge on your filter? Does it rise as the pump is running? When is the last time you cleaned the filter?

Janet