What should we do with water (by a swimming-pool)?

What should we do with water (by a swimming-pool)? When you have got a swimming pool... Description: a beautiful wimming pool. Image copyright: http://www.ultimatetaxi.com/mexico_vacation/best_swimming_pool_at_mexico_all_inclusive.jpg
You shouldn't pollute the swimming pool with food. Because it is dirty. Why not eat in the garden? Why not stop wasting water?

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