Thinking of getting one of [[http://www.amazon.co.uk/Bestway-15ft-36in-Swimming-57018/dp/B00FG8B9U6/ref=sr_1_6?ie=UTF8&qid=1403370307&sr=8-6&keywords=Swimming+pool+15+ft these]] for the garden this summer. I know it's going to bugger the lawn but I guess I can re-seed it in the autumn. Any thoughts on safety (dc are 9 and 11 and good swimmers), heating it, keeping it clean etc? Thanks.