Hi, First of all, we are absolutely thrilled!! We bought our Softub "Ressort", which was built in 2008, in very good condition at the end of March. Since we wanted to avoid chlorine and other additives from the start, we opted for SPABALANCER and SPABALANCER ULTRASHOCK. After a great consultation by the company AQUA-Whirlpools, we ordered the products listed above. Initially, after filling the pool with close to 1000 liters of water, we treated the...