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

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.

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....

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....

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X2

Agreed

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.

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.

I also would not spend much money to keep the sensors working, but why even consider putting salt in the tanks. Some salt residue ends up in water from a water softener. Reson beads in a water softener attract minerals which become attached to the beads and are removed from the water. Salt is then used to flush and clean the minerals from the beads. Salt will do nothing but corrode just about everything it comes in contact with including the sensor probes so do not put salt in the waste tanks.

2oldman wrote:

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.

If you use enough salt you can stop grass from growing.

The main purpose of the sensors is for the salesman - "And you have this monitor to check tank levels..."

We use just the water pump and the fresh water tank level to determine usage.

waste of time and energy. you'll quickly learn to guestimate your usage.