It was not making this sound last week that I know for a fact but lately its been sunny in North Carolina so I went out today to add water to the pool(this was in the early morning when the pool hasn't turned on yet) since it was below its recommended range. I go back outside a couple hours later to see that the water is at a acceptable level but I hear the pool smart filter making the buzzing sound and I cant find anything online to address this matter or to brush it off. Anyone have any idea what the problem is if any?( I will check if this is still happening tomorrow to make sure it isn't a one time thing)