Table Salt in Gray and Black Tanks?????

[rondeb]

We are currently staying in a very hard water area. We DO NOT use our Fresh water tank but last year our gray and black tanks got a hard water residue on them and would not register correctly. I got them cleaned up and am hoping to prevent the same thing again from happening.

My question: Has anyone used table salt possibly pool salt directly in the gray and black to keep hard water from forming?

Does anyone see a drawback to this?

Thanks in advance

[Shearwater]

Table salt will not affect hardness. It is used to regenerate the ion exchange resins in water softeners but that is a different chemical situation. Diluted vinegar is effective if you let it sit for a long time. A solution of citric acid would be more effective.

[2oldman]

rondeb wrote:
I got them cleaned up and am hoping to prevent the same thing again from happening.

It's like trying to keep grass from growing.

[obgraham]

Agreed

[Dog_Folks]

sch911 wrote:
Personally I wouldn't spend a dime trying to keep the tank sensors working. They're a lost cause in most RV's. Still it's pretty easy to tell when things are full. I don't need them....

+
X2

[sch911]

Personally I wouldn't spend a dime trying to keep the tank sensors working. They're a lost cause in most RV's. Still it's pretty easy to tell when things are full. I don't need them....

[brirene]

Incorrect gauge readings were probably not a result of the hard water. Those gauges are notorious for giving bad readings frequently. You could try the Geo method (google it), but you'll still most likely have incorrect gauge readings from time to time, if not constantly.