I have a full box of marine salt (instant ocean, i guess) from the time when I used to keep puffers. Well, the box has been sitting on my shelf and I am wondering if I can use it in freshwater aquariums to treat diseases. It upsets me to waste something, I dont want to throw it away, neither know anyone who keeps saltwater aquariums...
So can I use it in my freshwater aquariums when treating diseases?
So can I use it in my freshwater aquariums when treating diseases?