citric acid is a descaler

Ooh ... i love the 7000 model, InCharge. I will keep it in mind for when i get a larger place. In the time being i will just order another shower filter.
I believe the descalers are universally composed of citric acid - i just put it in the boiling tank and push heating for 1 hr. I learned to save on that item with my present distiller by buying citric acid from health food store :)