We have had an inflatable whirlpool from Intex for some time now, which is now filled with salt water. Unfortunately, maintenance is not so easy without the addition of other agents. We then changed the water more often. Now the maintenance is easier with SpaBalancer Basic and SpaBalancer UltraShock and the water doesn't have to be changed so often. Great products that are a bit more expensive, but definitely worth it.
Gabriele N.