Help! Green pool!

so...pool was awesome BUT freezing. Trimmed some trees, now it's warm but GREEN! Last night I tested the pool water....
Free chlorine
PH 8.4
Alkalinity 180
Hardness 800
CYA 30

I added PH minus (I know I'll probably hear about that but I didn't know what else to do and my kids eyes and skin burned!)
Tested again this morning
Chlorine 1
PH 7.8
Alkalinity 180
Hardness 800
CYA 30
The HTH thing I use says to add more PH minus.

So, what do I do to lower PH, etc to fix the skin burning? And how to fix the green? (Pool has been greenish before, but never burned their skin/eyes!)