@Whale said:SpaSpray – frankly, I’d be more concerned about the fact that an average spa weighs around 2 tonnes (when full of water and people).
2 tonnes is only 2 cubic meters of water. I don’t know a lot about spas but I could imagine that 1m deep x 1m wide x 2m long is a modest sized spa. It could be heavier! A serious safety issue is quite possible also if that is put on a balcony.