So, all season I was never able to budge a ring of scale from my pool left over from the previous winter (Scaling - does it help to add additional chemicals beyond controlling chemistry?).
I have drained the pool below the ring for the winter closing. I thought of taking a sponge and wiping Muriatic acid over the ring to remove it. Is this something that I would need to leave on, just swipe and rinse .... - anyone know?