Hello, thank you for your question. My name is Tony and I can assist with this.
If you cannot persuade the council to take further action on your behalf, then you may have no choice but to take steps yourself.
You could consider instructing solicitor, to send a strongly worded letter, bringing to issue court proceedings based upon the law of nuisance.
The law of nuisance requires the court to take a balancing act, in relation to activities that would otherwise be lawful (and sometimes normal), so as to ensure that they do not unreasonably interfere with a neighbour's enjoyment of their own land.
So whilst the use of a fishpond, with an oxygenating device, my normally be lawful, the court could prevent its use if, on balance, it considers it will create an unfair interference with your rights on your land. You're right, of course, is to enjoy a peaceful existence without undue noise from activities from your neighbour.
Whilst I am no aquarium or fish expert (such as the sleeve) that would prevent the noise from occurring, and which did not adversely affect the fish.
In that case, the court is likely to require such a device to be used, as that would be the most reasonable approach in the circumstances (assuming the cost is not exorbitant).
I hope the above gives you a useful indication, but as this is a chat, I am more than happy to run through any questions with you.
Hello, I'm sorry, I haven't signed off - my computer has problems!
I'm on a different system now, and I had to travel to get to it - so apologies.
I would add, in response to the points you make, that the council will have to be convinced that this is something that can easily be resolved by the neighbours for them to rule in your favour.
And that it makes an unbearable noise that you have to suffer.
The best route for you would be to get a strongly worded solicitors letter sent - it's amazing the effect those can have.