I have a 1750 gallon pond, I have to put in salt to cure something on my fish, I have some aquarium salt and will also be using some regular salt, like table salt, I'll be doing half the normal dosage and will it kill my plants? Could I add some brackish or saltwater fish to the pond, I know you can keep fish such as snooks in freshwater also. Mostly I want some coldwater cod, can I? this is an established pond and has a liner and filter