Our pool is a month old, kids have been enjoying it with the use of our heat pump. Yesterday afternoon out of no where i started to hear a gurgling/popping sound and noticed little bubbles combing out of a return. ??? This was not happening on the prior 30 days. I would have noticed because I’ve been spending a lot of time in and around it. This sound can’t be missed. I checked the filter and pump lids, no obvious issue or sounds near the.