Hi,

Please could someone help.

I live in london, uk and have had crystal clear waters in my pool (approx 79000l) all summer. However after a recent pool party and my adding of chlorine and ph adjusters, the chemical readings are very strange. I was having difficulty understanding the readings using normal dye tests so went out and bought a SCUBA II digital reader to provide more accurate readings.

The readings I currently have are
PH7.4
Free Chlorine - My meter just says HIGH i.e. above measurable range
Total Chlorine - My meter just says HIGH i.e. above measurable range
Cyuranic Acid = 114
Total Alkalinity = 268

The pool has a turquoise / green tinge to it, there is some residue on the sides of the pool. Having said that it was just about useable today... even though it was no where near its crystal clear blue normal self.

The pool has a vinyl liner and an air source heat pump, with water heated to 30 degrees celcius.

Do I need to wait for chlorine levels to drop over a period of time?
Should I partially drain the pool?
Should I isolate / turn off the heat pump to avoid any damage due to high alkalinity?

I normally used stabilised chlorine granules to santise along with chlorine tablets in the skimmer.

Really hope somebody can help with meaningful advice. I would prefer not to drain the pool as it is so large to refill, but will do so if there is no alternative.

Hope you can help!!

S