"Alexander" wrote:

Think i'll experiment a little more before investing in a :"You should
use an ion exchange water softener. Forget the acid."

Go to a good pet store that has salt water aquarium products, there is
an ion exchange unit "tap water purifier" sold to reefers which for
like $50 will filter something like 200 gallons.

http://www.thetropicaltank.co.uk/rev-twp.htm