I have just slammed the other pool I care for, followed the instructions on here and the pool passed the 3 criteria for slamming. Have got the pool water chemicals all settled,
However the water appears to have lost its sparkle and I am not sure why, as stated above the results are all fine, the only thing I can think of is that the filter needs replacing. I did a deep clean of it before I refilled the pool but the sand has never been changed in 7 years, and the pool is in a very dusty environment. Is there any sort of test to confirm whether this is the case?