Well I thought I had read everything on here and had a handle on all the numbers and where they needed to be but for the last 5 days, I've had a major problem. Water was clear last Saturday and Sunday...numbers were all spot on. It was a little dirty on Sunday so I vacuumed and all good. Did not have a chance to do anything on Monday but chlorine still good. Tuesday it looked pretty dirty. I vacuumed and looked good but the next day it was completely dirty again and looked green. Again, I vacuumed but I noticed everything I was sucking up seemed to be coming right back into the pool...green water. I tried to vacuum and it looked a little better but I got frustrated thinking I was wasting my time since it was being pumped right back in. So I was thinking i needed clarifier. Added the recommended dose on Thurs. Thurs night decided maybe it was algae so started shocking and kept it at 12-14ppm for 2 days. No sign of improvement. In fact yesterday and today, now it is very hazy and the crud on the bottom is brown. I've changed my mine so many times as to what the problem is, that now i don't know what to do....help! Here are my numbers and info as of today. I did add a little more cya as that has been under 30. There are some pecan trees above the pool...could this be a buildup of sap or something? Haven't had a problem from the trees all summer. This situation just came up so fast.

Above ground Intex 24 foot round pool that holds 14000-15000 gallons.

FC - 4
TC - 5
Alk - 120
ph - 7.6
CYA - 40

These numbers are to the best of my guessing - I'm still having a little trouble reading the colors. I'm using a test kit from Leslie's. As for Cya, the dot gets faded but i can still see it if i try. Not sure when to stop counting. Should it completely dissapear?

Thank you in advance for any help.....I'm so confused, I'm about to give up!