NO CHGLORIN READING AND CLOUDY POOL

[UCY]

SINCE MONTH I HAVE PROBLEM WITH MY POOL AFTER CHANGING TO SAND FILTER AND A VERY HOT SUMMER IT SEEMS THAT I DON'T GET MY POOL UNDER CONTROL. AFTER CHOCKING.NO READING OF CHLORINE AND STILL VERY CLOUDY USED FLOCCULANCE NO RESULT. WHAT TO DO EVEN EXPERTS ARE HELPLESS.

[chem geek]

You don't just shock the pool once to get rid of algae. You add chlorine to maintain a high shock-level of Free Chlorine (FC) and that requires adding more chlorine as it gets used up. Initially, that could be every few hours and then twice a day and every day after that. Read this link for more info. Also note that if the Cyanuric Acid (CYA) level is very high (> 80 ppm), you are better off doing a partial drain/refill first since it will take way too much chlorine otherwise.

[mvp2ooo8]

gem geek is right
also try a stabilizer
that should help it hold chlorine