Start by vaccuuming to waste the brown stuff on the bottom, adding enough muriatic acid or dry acid to get your pH down to between 7.2 and 7.8 (if using muriatic acid I'd start with about three cups, test a few hours later, and repeat as necessary), and get some chlorine in your pool. Repeat the vacuuming daily until clear.
The pucks you're using are probably tri-chlor and if they are they contain cyanuric acid (CYA aka stabilizer). That's OK but you need to monitor your CYA levels regularly if you're using those. You're likely to have a very high demand for chlorine because of all the junk in your pool. Most people here use ordinary, unscented household bleach to chlorinate with.
Regardless of what chlorination method you use, you need to raise your chlorine to shock levels until the pool will hold free chlorine overnight. Ben's Best Guess Table (http://www.poolforum.com/pf2/showthread.php?t=365) calls for 6-15 ppm for your CYA level. You can download BleachCalc, written by mwsmith, one of the members here, to determine how much bleach to add to get to your desired chlorine level (http://www.hal-pc.org/~mwsmith2/BleachCalc262.exe). If you go that route you should stop using the puck feeder while you're using bleach.
I'd shoot for about 10 ppm free chlorine if I were you (again, table recommends 6-15 ppm) and keep bringing it back to that level until it holds overnight. It's best if you can test several times per day (e.g. morning, after work, and right before going to bed) and add enough bleach to bring it back up to 10 ppm after each test (or whatever level you decide on).
Good luck.
Bookmarks