Is it essential to have a pump and filter in a garden pond?
Recently I've had problems with my filter pipes leaking, when fixed I had new leak!! I had to turn it off and I think to truly solve the problem would need drastic work, cutting into the cement and stones.
Not sure I like fountains but maybe I could fix one to the pump and this would oxygenate the pond? It's been off a few weeks now and all seems well but not sure if it will stay healthy?