I am converting my FW tank to BW and would like to know if all of my fish will be okay. I have a well-planted 29 gallon tank with an Eclipse hood. Right now I have two killifish, 6 tiger barbs, one green tiger barb, three cory cats (various), a bumble bee goby, three mollies, two ghost glass shrimp, and an albino stubby-nose pleco. So far I've just been adding a tsp of marine salt per gallon when doing 5-gallon water changes each week and everyone seems to be doing fine. I know the mollies and goby will do well, and I've read that the killifish should be alright, but I was wondering about the cories and the barbs. I have a 55 gallon tank that's FW but it's mostly aggressive cichlids and sharks so I fear my barbs would become lunch in a hurry. Any input?