Like I mentioned before are you sure the water that is running out is salty?? As it may be top up water.
I did dip my finger in it and it didn't taste particularly salty but there are signs around the top of the water container that something has been added to it. Mixed the water and H2 Ocean powder together in the quantites recommended on the tub, left it overnight to air and had to connect it to the tank this morning as the other had run out. Fingers crossed I've done it right
Sorry mate didn't realise but the way it sounded it was like no ones there to look after the fish and you saw an opportunity. I'm surprised the widow has even thought about the fish. Even if I loved fish keeping and it happened to me, I wouldn't give 2 sh1ts about them.......for a while anyway!