Whirlpool with sound system or not

We also ordered our hot tub today, it is an Armstark Hamilton. Which pools do you have?

So not canceled after all, have fun with it.

Currently Jacuzzi (Indoor).
In the new building, there will be a proper pool (stainless steel).

We are planning to buy a Treesse Zen whirlpool and a swim spa in 3/4 years.

Quick question about the heating:
We are currently renovating our house and when the new heating system is installed (ground source heat pump), the heat pump should also heat the whirlpool and later the swim spa. If both have a 3KW heater, do I simply add 6KW heating load to the house's heating load and then buy the heat pump accordingly?

No, you should not do that. The heat pump should be suitable for the house. Otherwise, it will always have to cycle.

I would also view the idea of doing it via the heat pump rather critically. Especially when operating in colder environments, you need the integrated heating element to compensate for the heat loss. Otherwise, the water gets cold very quickly and the fun is prematurely over. Moreover, you have to consider the additional investment; a corresponding heat exchanger already costs 500€ in materials, plus piping, labor, a larger heat pump ... that noticeably costs four figures, and for that, you can already heat the whirlpool "conventionally" for quite a while.

Regarding filtration, does it actually still run with chlorine? I have already seen many products with ozone/UV?

I would also like to have a whirlpool. What bothers me is the thought of using about as much electricity for the whirlpool as for heating the entire house...

I would also like to have a hot tub. I'm only bothered by the thought of using almost as much electricity for the hot tub as for heating the entire house ...

Those are my thoughts as well. The electricity costs really put me off. That's why the hot tub shell will have to be enough for us for now.