I can’t help to recommend a different one, but my observation is diaphragm pumps don’t really have the ability to push air efficiently below 4ft despite the ratings. The air flow decreases substantially the lower you go. I have a diaphragm pump in my garden pond at 4ft, and it puts out maybe 1/4 the airflow it does at 2ft. That and the stones clog up with deposits easily as there isn’t enough airflow to prevent deposits from building up.

There are much stronger air pumps, but the few non diaphragm pumps I have seen are loud and should be housed in a barn or enclosure so you don’t need to listen to them, but should be protected from especially cold air if running them in the winter.

There is a sub forum on here about aeration specifically that you could mine for ideas and what other folks are using.