I have air in one of the returns when my pool cleaner is running. The pressure gauge on the filter drops from 80kpa to about 30 kpa when the pool cleaner (Baracuda Classic) is connected. Before I noticed that air in the returns the drop in pressure was to about 50kpa with the Baracuda running .
Also I have noticed that the pool is loosing water.
I suspect I have a leak , can anyone advised if its suction or return? Why is the air apparent in the return when the pool cleaner is running and not at other times.