so i was having such trouble with my fish and i traded them all in for one green spotted puffer. i have a little bit of salt in the water right now. i heard that the water will need more and more salt as they get older. i would like to know how to do this and what i have to do to adjust my water to the puffers salt needs, also i think the puffer is juvenile, so how much salt should i add every water change to get it to a perfect brackish environment? any answers would be greatly appreciated!