Water turned green after adding shock treatment

[NowhereMan]

My pool water was crystal clear the other day prior to adding shock treatment. I tested the water and the chlorine level was non existant, PH was on the acid side. We had several days of rain. I added shock treatment (liquid shock) to the pool, soda ash to the pool and stable chlorine tablets. As soon as I added the shock treatment i noticed areas of the pool began turning green. In less than 30 minutes, the entire pool was green. It's been a couple of days now, I've since added more stable chlorine tabs to the skimmer basket. Testing this morning shows the PH @ 7.0, the chlorine is 3+. I've been running the filter for 4+ hours per day.

I've had a pool for 17 years and haven't seen this happen before. Why did my water turn green and how do I alleviate this problem?

Thanks!

[waterbear]

test your water for copper....I will bet that is the culprit. Have you added any copper based algecides or are you using "dual action" trichlor tabs with copper?
A metal sequsterant will take care of the problem if your water tests positive for copper. Just follow the directions on the bottle. Jack's Magic Blue Stuff is excellent for copper, btw.

[NowhereMan]

Thanks for replying. I did add algecide when I initially opened the pool. I'll take a sample in to my pool store and have it tested for copper.

Thanks Again!

[waterbear]

If it tests postive for copper you will need a metal sequesterant.