Re: calcium buildup in sanitation hoses
Vinegar is largely a waste of time. Muriatic acid might work but there are a lot of issues with that. As an alternative, pick up some RydLyme; Barnacle Buster or a similar product, run it through your lines and let it sit for a day or two and then thoroughly flush you system. In future, use something like Salt-Away, added to the final rinse of your head/waste lines after every use, and you won't have to deal with the matter again.
"It is not so much for its beauty that the sea makes a claim upon men's hearts, as for that subtle something, that quality of air, that emanation from the waves, that so wonderfully renews a weary spirit."