I have a Gunite pool in CT. I have had the pool for three years and this is the first year that I had algae growing on the walls (just below the tile). I have never had this problem and have never used any algicides.
This year its a problem.
I was wondering if others have noticed excessive aglae this year or could it be due to the fact that this year I started using a non-chlorine shock? I always used a chlorine shock until this year.
I'm interested to hear what others have to say.
Regards.