Property owners of holiday rental property with a private pool must comply with a series of legal requisites.
Described in this Real Decreto. Time permitting, I will add translation of most important requisites.
Guarantee the safetey of kids under 5 years old when the pool is not in use, by covering it up, alarm installation or fences with lockable gate is one of the most important. Reporting of any incidents to the relevant authorities is another.
Most others have to do with the quality of the swimming water, chemicals allowed to maintain sanitary condition etc.
ROYAL DECREE ON TECHNICAL SANITARY REQUIREMENTS SWIMMING POOLS