Cloudy Pool

[Finnegan]

We have a Triton II sand filter with a G3 Barracuda. Our pool is in serious need for replastering. About 2 years ago, we had a new motor installed as well as replacing all of the sand. It was determined by the professionals that the sand particles had become too rounded and were not effectively filtering anymore. Subsequent to replacing the sand, there was a sparkling clarity for about a week, then a return to a cloudy and eventual greenish color despite adherence to standard chemical maintenance efforts. (Cl between 2.2 - 3.4; pH between 7.4 - 7.6;). I've had numerous and various pool experts analyze water samples and they have all offered their strategies for this problem. None have worked. In my reading of the Triton product, it may be likely that one or more of the laterals got damaged, either by the new sand installed, or just wear and tear. In any event, after I backwash, a huge plume of material blasts from the returns when the pump is returned to it's normal filter position. I've resorted to sweeping the pool while back washing to completely remove the sediment/algae/detritus, but this is time-consuming and wasteful. It seems then that I must remove all of the sand from the filter to see if my assumptions are correct. How long will it take to do this; can I save most of the sand for reuse; can the filter be emptied without disconnecting all of the leads?

Thanks for any suggestions~

[waterbear]

Subsequent to replacing the sand, there was a sparkling clarity for about a week, then a return to a cloudy and eventual greenish color despite adherence to standard chemical maintenance efforts. (Cl between 2.2 - 3.4; pH between 7.4 - 7.6;).

What is your CYA? I assume you are using trichlor tabs for chlorination, correct? I suspect that your pool is overstabilized. Also, how is the pool being tested to get readings of 2.2 to 3.4 for chlorine and is that free chlorine or total chlorine? Your readings are suspect. Please post a FULL set of test results since your problem is water balance and not filtration if you went form clear to cloduy and green. That is a symptom of overstabilization (CYA too high for the FC level you are maintaining).

Fix your water balance issues and you will no longer have the problem. NO filter will remove living algae and that is what you have.