Very Green Water since last two months

[mbar]

finch is right on. In order to kill an algae bloom completely you have to maintain a shock level of chlorine and let the pump running 24/7 for a couple of days till the chlorine level stays level overnight. Checking as often as you can during the day to get the levels back to shock. If it is true that you have no cya in the water, you will have to add bleach all day when the sun is shining as the sun eats up the chlorine that is not stabalized too. Finch is right, it can take up to a week for the cya to show up - add enough to get to 30, most people like to run their pool between 30 - 50.

[ripplev]

Thanks everyone for your help.

I added some hth ph decreaser and stablizer yesterday.

My water is blue now but still very cloudy.

Here are my latest readings:

FC - 7.5
CC - 0.5
Ph - 7.5
TA - 250
CYA - < 5 ppm (I added stabilizer (HTH Stabilizer) last night in skimmer so I believe this should take about week to give me good readings. But I can definetely see some difference today in my CYA testing. Last night I was able to see the black dot very clearly, today I can still see it but its getting little fuzzy.

Let me know if I need to add any more chemicals except bleach.

[Watermom]

Your alk is too high. Read the sticky at the top of the alk forum for directions for lowering it.

[finch]

"Let me know if I need to add any more chemicals except bleach."

The less the better with most chemicals. I think you are on track so I wouldn't fiddle with much.

At this point you mainly need to stay on top of the chlorine level and make sure your ph doesn't stay up above 7.6. I would hit it with more chlorine to get the fc level to 10-15.

The most important thing is to not let up, even for half a day. It is a good sign that the pool is less green, but milky. You are killing the algae, but until the pool is clear and you have brushed and killed anything on the liner you don't want to let up or you could lose control of it again.

I would stay focused on solving the algae problem first. Then the total alkalinity can be eased into shape. I think the recommended TA would be about half what it is at the moment. Be sure to follow the advice on this forum of lowering ph and aerating to bring ph back into range:

http://www.poolforum.com/pf2/showthread.php?t=191

or you could get yourself on a treadmill and never permanently lower your TA. I got caught on this treadmill half a dozen years ago. It cost a few hundred dollars before I finally threw up my hands and got off. I simply lived with the high TA, which crept down over the next few seasons, but now understand the solution.