Crazy levels.

[Chief0424]

Here is the situation. I am trying to figure out water of friends pool. Never saw this before. Pool is green.
FC .5
pH is yellow and unreadable. I would compare it to a fc5 color.
TA. Did the test and when I added the 5 drops to turn it green it went right to red. So I don't know what it is.
CYA is 40
I've been following this forum since I installed my pool. I am usually pretty good and fixing issues but this one has me stumped. Not sure where to start. Do I try to raise pH? If I do won't that increase TA? Obviously I know I have to slam. What do I need to focus on first

 

[mknauss]

TA is zero or below. That means pH is 4.5 or below.

Add 30 ppm TA worth of baking soda. Run pump and brush well. Test TA. Repeat until you get a TA above 50.

If pH still shows yellow, add 0.4 pH rise worth of borax.

Follow the SLAM process.

This is typical of a trichlor puck treated pool.