Originally Posted by hellosailor
"I have both fresh and a salt water tanks ".....
Salt water tankage on a 29' boat? That would be *most* unusual.
Agree with Hello that there is absolutely no need nor likelihood of a salt water tank on any boat.. If you need salt water, there's a world of it outside the hull - why would anyone lug it around?
In any event, clean them both out and use them for fresh water once you figure out the filling routine.