Alan Holmes wrote:
My Grandad used to put a couple of goldfish from the pool in there, and
swap them about every week.

That assumes that the OP has a pond,

err.. No. It just tells you my Grandad had one...

You can leave the glodflush in the water but, with a bit of oxygenating
weed, but Gradnad reckoned they liked a view of the sky.