When you swim in your pool, do you experience dual temperatures? Like warm in the top layer of the pool and colder in the bottom layer?

If your answer is yes, then the water circulation in your pool is not efficient.

Pool owners who rely on just their water pump for circulation of chemicals, BEWARE of this.

You need to mix the chemicals properly by moving the water in those dead spots. Use a brush to move around the water in that particular area.