Help with pool

[tim665214]

About a month ago my pool turned green. I have been fighting with it since then. (And spending lots of money). I am so excited that I found this site last week. However, I just got my K-2006 test kit, so I am now able to post real numbers. Through the use of heavy shock (Trichlor) I was able to get my algea under control. However every morning when I go outside, I still have small spots of algea around the outside of the pool. I vacuum to waste, but then the next day they are there again. About a week ago I took a test to my pool store and they told me my cya level was 145. I drained about 18" out of the pool and refilled, then my cya was 115. After vacuuming to waste a few times and backwashing once, here are my numbers from yesterday at the pool store:
FC 3.37
PH 7.8
CAL 101
TA 167
CYA 60
I do not see how my CYA level could have dropped from 115 to 60 with just backwashing and vacuuming. (I started using plain bleach to chlorinate about a week ago also.

Here are the first tests from my kit this evening
FC: 5.2
CC .2
PH 8.0
TA 225

I added 1/2 gallon of muratic acid to try and get my ph down. I am waiting for that to distribute in my pool, before I do a CYA test from my kit. Once I do a CYA test, I plan on shocking with bleach to whatever level is needed based on CYA level.

One other thing, I have city water, but I live in a rural area. I tested my source water and got the following:
FC .8
PH 7.7
TA 280

The TA level of my source water is VERY SCARY!!! What can I do about it?

This is the summary of my situation. Sorry it is so long, but I wanted to cover everything.
Am I on the right track? Any help would be appreciated.

Thanks

Tim

8300 gallon AG pool. (not Intex) 22" sand filter. 1.5 hp motor running on low.