Boxing trainer Ronnie Davies's fighters say the water he found in a well in his garden is a knock-out.
Now he is thinking of marketing it under a name like Punch or Ringside.
Portslade-based Ronnie hopes he can give his contenders a new edge after discovering the apparently pure water at the bottom of a 135ft well.
The first of his boxers to try a glass of the water won his fight that same night.
Ronnie - who trained world champion Chris Eubank for ten years - said: "It's crystal clear, ice cold water and tastes delicious."
He noticed a deep hole in his back garden when he moved into his cottage 23 years ago. But he simply put a slab over the opening and forgot all about it.
Ronnie, 55, of Hangleton Way, said: "I've been too busy with the boxing all this time. It wasn't until I had a bit of time to myself a couple of months ago that I decided to look at it again."
When he dropped a bucket down the well he was amazed to find 15ft of pure running water at the bottom of a 120ft drop.
He said: "One of my boxers, Chill John, was the first to try a glass and he won his fight that night. I've never seen him box so well, so there must be something in it."
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