So what your saying is I need something lower in PPM concentrations of NaCI, since goldfish eat plants, I could feed them lettuce bits which are naturally low in sodium. Maybe that would be the key?

As for the fish though, I keep about 7 in there, and have to get new ones almost every week because my turtle eats EVERYTHING, he used to have a turtle friend, till he ate him. I call him Mr. T.

But as for my tank being dirty, it is looking pretty crystal clear right now.

I'll look into that foam stuff pretty soon though, probably after this harvest.