anthropic,
I did add salt and documented such in at least one of the posts in this thread.
I usually salt my nursery tanks to 3ppt (parts per thousand) but i try not to salt my aquaponics systems because some plants like strawberries and even tomatoes dont care for it. The fact i only lost two of 130 fish after transporting them 4 hours from lousiana where i met a fish truck that came from arkansas is outstanding results.
The fact is he was probably damaged at some point, maybe I crushed him a little when i set bag in the cooler for transport.
In addition to helping the immune system, salt also helps the fish breathe if the water is high in nitrites which was also happening.
Cecil, i used a home depot brand pond liner (total pond). I guess it's some sort of pvc so maybe that method wouldnt work for you.
