After going through the forums I believe the solution I have come up for my cloudy pond! We moved in last year and pond was fine three small fish no filter or pumps, lots of frogs and snails looks like a soild eco system but in the last few months it has become cloudy and the fish are on the top looking like they are gulping air the pond level has droped by about three inches! A full clean out would be bad for the eco system right? so reading the tons of advice I propose to

1)by pond vac and clean out bottom

2)cut back all plants around pond

3)fill the pond from hose

Your thoughts would be appreciated

Steve