I’m sorry to say that it’s too late for one of my fish but hopefully this oxygenator will prolong the life of the remaining two.
I’d noticed that my goldfish were discoloured and gasping for breath. It’s a small pond with no running water. There clearly wasn’t enough oxygen for four (Originally!) fish. Frogs and newts have long thrived in my other larger pond and these fish lived in my parents’ garden in the smaller pond for years… but there they had a pump!
The two remaining fish seem healthy at present, seemingly benefitting from the increased oxygen levels. I won’t go into detail regarding how the oxygenator works. The clue is kind of in the name!
Oh! It cost about £30 from the South American rainforest. There are cheaper options on the electronic bay!