I have an 18x36 inground pool with a vinyl liner. Most everything I have read is that you can ignore any CH readings. In general my readings have come back very low, usually 0-20. Is there really any value too low for a vinyl lined pool?
But more importantly, my deck around the pool is made of stamped concrete, and anytime anyone is in the pool the first foot or so of decking around the pool is constantly wet. This is usually about an hour or so most days, but is often up to 8 hours several times a month. Is there any leaching or damage to the concrete being done if the CH in the pool is very low? What would the recommended value be to prevent concrete damage? The concrete does have many pre-cut channels to prevent frost damage, so the water easily gets to more than just the top surface.