I have never used it but I believe the algaecide caused the foam. Posts here indicate it will subside but I wouldn't use any more of it.
Bring your pH down to around 7.2 - 7.6. That's where you need to keep it. Muriatic acid does well for this. Download bleachcalc if you haven't done so and use it for your acid doseage.
You need lots of Clorox. That what's gonna' clear your pool. Start with enough this evening to bring you Cl up to about 18ppm or so. It will start down IMMEDIATELY so be prepared to add more clorox to bring it right back up to 18ppm tomorrow morning. Follow this procedure daily and your water will clear. run your pump 24/7, backwash when necessary, and brush and vacuum probably once a day. You will see a huge difference in the next few days if you stick with this regimen.
I'd get rid of the 3" pucks. They're driving your CYA up and it's about high enough already. You may go back to them from time to time but I wouldn't use them as my primary source of Cl.
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