Question about Intex Purespa Bubble Massage

Hello together

We set up the whirlpool in winter and it worked great.
Even winter in the lowlands with sub-zero temperatures and sitting in the 38° warm whirlpool is great ;).
However, we had to keep the pool heated at all times. Otherwise it would have taken longer to warm up and probably cost more energy.
Wouldn't give it away again!

I empty our boiler about 6 times, then the pool is full to the top and 42 degrees warm, then we can go straight in, the pool is on polystyrene so that the bottom is not quite so hard, it draws about 2KW.

Have not had any experience yet