CYA Level Somehow Increased

[JohnT]

The obvious possibility is that your pool isn't 40,000 gallons. Most pool companies overstate the capacity for some reason. How big is the pool dimension-wise?

[CJDahl]

Thanks for response JohnT

Dimensions are 22x27x45 Lagoon
40" in shallow end and 8' in deep end

[JohnT]

Thanks for response JohnT

Dimensions are 22x27x45 Lagoon
40" in shallow end and 8' in deep end

That IS a bigun. The only thing I can think of would be some possible dirt, algae or chemicals in the water giving you higher turbidity than normal. It can look crystal clear but have enough in it to skew the CYA test.