Is there a lot of debris in the pool that can be scooped out? If so, get a net and get as much out as you can. You'll want to take your chlorine up to shock level and try and hold it there as consistently as you can. Do you know your cya reading? For now until we know your cya reading, I'm going to recommend that you raise your chlorine level up to 15ppm. In a 30K gallon pool, each gallon (4 quarts) of 6% bleach will raise your cl reading by 2ppm. Test at least three times per day and each time, add enough bleach to get back up to 15ppm. Also run your pump 24/7. You'll also want to work to get your pH down. Add doses of muriatic acid until you get your pH down to around 7.2. Each 24 oz. dose will drop your pH by about 0.2. Don't try and do it in one big dose. Be careful with the acid. It is nasty stuff. Don't get it on you and be down wind of the fumes.

If you don't have a good test kit, you'll want to get one. The one we recommend is the Taylor K-2006. If you buy it from Amazon through the following link, the Pool Forum makes a little money in the process. http://www.poolforum.com/pf2/showthread.php?t=10006

Keep us posted how things are going.