I have a 98000 litre infinity edge pool with about a two metre drop to the trough below the infinity edge.
I have an automatic chlorine and acid dispenser that maintains pH and OCP.
The chlorine and acid dispenser do a good job of maintaining pH around 7.5 and chlorine level around 3.
I run alkalinity around 70-90, CH around 250-300 and cyanuric acid around 40.
The problem with the setup is that the pool is using large amounts of HCl acid. About 20 litres every two weeks. If I allow the alkalinity levels to drop to around 40 this reduces markedly. I have hypothesised that the pH correction that is happening at higher alkalinity is due to the large water fall over the infinity edge alkalinising the water.
The high use of acid is a problem and I would value advice regarding possible solutions. Can I continue to run the alkalinity at 40 without damaging my pool. It is a tiled inground pool. Is there another way to reduce acid consumption.