I have an idea for a new business venture.
I will apply to the Crown Estates for permission to place mooring buoys such that boats can be held in the ‘Jacuzzi’ for a while to gently clean their bottoms.
What do you think?

Ash
The fish there, reputedly, grow bigger owing to the warmer water and, errm, possibly, the abundance of nutrients.... Only what I've heard, mind.sahona wrote:... there may on occasion be 'additives' that either kill the barnacles, or make them grow twice as big.