Help Green Water

[kerry anne]

Ok i have added everything that my pool store has told me to add, mur acid, shock (alot) yellow shock and clear, new sand.... etc etc.... and STILL green....at the end of my rope...... What can i do now? This is my test results from thursday listed below.....


Free Ava Chlorine: 0.19 Low
Total chlorine: 0.44 low
Combined Chlorine: 0.25 High
Total Alkanlinity: 130 high
pH level: 8.3 High
Calcium hardness: 133 low
Cyanuric Acid: 9 low
Copper: 0 Ok
Iron: 0 ok
Total Dissolved solids: 100 Ok
Saturated Index: 0.7 Scaling
And this is what they told me to do at the pool store:
add 6ozs of yellow shock and clear
Brush wall and bottom
then add 3 1lb bags of shock
brush wall and bottom
Don't back wash, the water SHOULD turn a powder blue in 24 hrs and take up to 3 days to turn clear

Well its Saturday and my water is GREEN.......................at a loss don't know what to do.... HELP

thanks
hopeless

[chem geek]

If it's a clear green, then it may be metals in spite of their not measuring any. In that case, lowering the pH will probably improve it (your pH is much too high) and you can then use an HEDP-based metal sequestrant unless the water is completely cleared up from the lower pH alone. If the water is a cloudy green, then it may be algae. Your chlorine level is too low and I wouldn't trust the pool store results anyway, especially not for CYA. Get your own good test kit and take charge of your pool. Read the Pool School for more details.

[Guest]

You have to get the PH down. Clorine is ineffective with PH that high. Muratic acid is best