Tulpa wrote:

Hi all,
Is it me or are all non filtered ponds prone to get smelly without the
benefit of growth and sunlight? I'm hoping all will come good when the
UV starts filtering through. Otherwise, I'm looking at draining with a
bucket and replacing all the hard work of last year!
Any ideas?

It sounds stagnant and it would take a pretty lot of sunshine to clear
that. Unless you have plants to oxygenate it you could well always
have a problem