green pool with high chorline

[PoolDoc]

Two things: lower your pH, and raise your chlorine. You also need to run your pump and filter 24/7 till you've got everything cleaned up.

You need to do both, but unless you have access to dealer testing with a pH meter, you can't get an accurate pH reading once you lower your pH.

So, go to Lowes or Home Depot and get a gallon of muriatic acid. Use gloves and glasses, and avoid the fumes, but add about 2 quarts (1/2 gallon) to your pool, tonight if possible. Wait 2 hours (or till the AM) and retest. If your pH is not below 7.6, add the rest.

Once you've got the pH below 7.6, you can start raising your chlorine. Add 12 gallons (no typo -- I mean "12") of 6% household bleach to your pool. You can pour it into the deep end, but make SURE your pump is running.

Do NOT try to fix anything else - TA, CH, phos.

Read the BBB method and Best Guess pages as you have time. Repost, as you get test results or things change.

Good luck!

Ben

PS: Lisa (Watermom) was posting as I was writing. What she's telling you is also correct, but it's a little longer term view than I'm taking. I assumed you'd want to clear up the water first and then address the high CYA. But, you can make that choice now, if you like. However, it will take high chlorine to remove the algae when you have high CYA. The "Best Guess" pages explains why this isn't necessarily a bad thing.