excellent, I recommend 1

No system to filter water but with a filter pump recycling system of our former D round pool or we do not bathed because too cold, plus a little chlorine night. Impeccable, we go all in five, including two 9 year old who make bombs, a baby of 21 months (the safety instruction not say that for children under 36 months is weak: it is capable of drowning in a puddle so strictly swimming with parents and more security bp). It is ultra resistant, pretty, tall without being intrusive on our terrace and with a drain plug and the water is especially good!