Too much salt can be as damaging to the system as too little...it might be helpful if you read the instructions.
If your toilet uses pressurized fresh water you need the 4 gallon that uses rock salt
4 gallon salt feed tank owners manual
If you have a sea water toilet you need the 2 gallon tank that you fill with a brine solution
2 gallon salt feed tank owners manual[/QUOTE
My actions for the first year were in 100 percent compliance from the engineers at Rartian.
They had no clue, so they just kept saying everything was normal.
So I added the salt tank and even then the Electroscan kept adding more salt than it should have needed because the plates must have been giving a false reading to the control box.
The 2 gallon setup I consider useless if you are in and out of fresh/salt water regularly...the engineers seemed to agree.
It wasn't until the plates failed and were replaced that anything seemed normal.
And even then the engineers couldn't fix the overflow valve so I went with Kevin's advice and the system now works as advertised.
I do read manuals...better than most. I recited many parts from memory to the technicians and engineers at Raritan. The engineers were so perplexed, they wanted to make a house call to see the whole setup. Everything from start to finish on that or any other expensive project I undertake is with full reading, peer questioning and factory support.
I did stuff like this for a living for many years....I have a pretty good rep about my marine tech work....comes from my previous career of a lot more demanding and dangerous job.