Ive been out of the aquarium hobby for about 7 years and it looks like a lot of new stuff to learn, such as I had a question about salt in freshwater aquariums, ive seen on several posts randomlly throughout the site saying they always put small ammounts of salt in all there freshwater aquariums and the fish get bigger and healthier because of it. is this true and if it is, how much salt, I assume marine salt you can buy at your local fish shop. I think one of the posts said 1 teaspoon per 5 gallons, another said 1 teaspoon per 10 gallons. just wanted some peoples opinion on this. and if it is true looks like im gonna have to buy more testing supplies, IE to get salt readings