You can get this cleaned up. We'll help.

In your pool, each quart of 6% bleach will add just a tad under 1ppm of chlorine and each gallon (4 quarts) will add about 3.5ppm. Test as many times per day as you can and each time, add enough bleach to get the cl back up to 10-12ppm. If you will sustain this high reading consistently, it will help clear the pool.

You really need a good test kit. The one we recommend is the Taylor K-2006 or 2006C (same kit, larger bottle of some reagents). If you buy it through the Amazon link in my signature, the Pool Forum makes a little money on the sale which helps us keep this form online. Only buy if the seller is Amato Industries, however. Some other sellers are substituting the K-2005 which you do NOT want. If Amato isn't listed, wait a day or two and try again. They seem to restock pretty quickly when they sell out.

In the meantime, you can force your kit to read higher than 5 on the chlorine scale by using a dilution method described here: Testing Without a Good Kit

Scoop out as much organic debris as you can and run the pump 24/7. Backwash the filter whenever the pressure rises 8-10psi over the clean filter pressure.

Your pH and alk look fine. Your CYA (stabilizer) is low. (I don't know how you came up with a reading of 15 as the lowest kits can usually differentiate is 30ppm.) You want to bump the CYA up to about 40. Put about 3 lbs. of stabilizer in an old sock and hang it in front of a return jet. Give it a squeeze once in awhile to help it dissolve faster.

Keep us posted of how it is going and if you have any other questions, ask. We're glad to help. And, just maybe, the birthday pool party can still take place!

BTW -- You don't have any bromine. This is a chlorine pool. Just ignore that side of the testing scale.