Question Author
Thanks for the answers some good and some funny
I actually thought of putting two radiators in a ditch but as it is the otherside of the lawn I think I would get some objection from her who is the boss but being lower than the pool it would surely do the job
I will check out the links -Heathfield -thanks
but the cost could be quite high
The reason we have the pool is because my wife has rheumatiod arthritis and it is very good when it is cold but in the summer here it is quite hot and the benefit then is gone ,we often have 30° plus and the water gets to about 28°