We have now had a hard-shell whirlpool from VivaAqua, model "Valencia", in our garden for six months and have been more than satisfied with SpaBalancer from the very beginning - on the recommendation of VivaAqua - with the easy handling and above all with the water quality. After bathing, we have no problems with dry, tense or chlorine-smelling skin. We stick with it and can only recommend the SpaBalancer products.
Many greetings from the south of Germany!
Peter & Natascha S.