Yes, I agree, Leroy-Merlin is a great store for pools and equipment as well as almost everything else. However, it all depends on what size of pool you desire. For instance, my wife & I own a large house in North Africa (it's for sale - by the way) and we had a simple plunge-pool on the lower floor, which was excellent - even though it was sizzling hot in summer. I almost constantly languished in it with my G&T's. And until recently we also rented two properties in Spain - one with a very large pool, but it was just too big, we felt. We decided to only have the one rented property, a small house in Sierra Golf, which suits us perfectly - so here we are. We intend to buy another plunge-pool for the summer, an inflatable that will allow us to pack it away for the winter months where a pool is not required or used - unless it's covered and heated.
Carre-four is a very good source for this type of pool as well as all the anciliary equipment needed and at a very good price. I think that's where we will be heading soon. Al Campo supermarket is another handy source.