Using salt in the freshwater aquarium | Algone

Non-iodized table salt is generally recommended for use in freshwater aquariums.
Photo provided by Flickr
In the U.S. since the 1990s it's been a common practice to add salt to freshwater aquariums to prevent some diseases and balance osmotic pressure. it's been added for so many years that some freshwater fish get sick and die without it. Do you add salt?
Some Suggested Salt Sources for when salt is used in a freshwater aquarium:
Photo provided by Flickr
Read the directions on the packet or box of aquarium salt. The quantity required for a general tonic in a community freshwater aquarium, a salt medication or use in conjunction with commercial fish medicines varies greatly, so it is extremely important to choose the correct dose. It is difficult to overdose with salt, but too much may cause your fish unnecessary stress. RO water is the safest water you can use for salt and freshwater aquariums.
Photo provided by FlickrThe brand I got was  Wellfish's Aquarium salt for freshwater fish. It say the salt never evaporates and is not filtered out.
Photo provided by FlickrAquarium Salt (Sodium Chloride – the same as kosher salt and cooking salt) is often sold for use as freshwater medication.
Photo provided by Flickr
Freshwater, as in rivers and lakes, does not have appreciable salt content in nature. Most of the plants that we see in an aquarium come from such habitats. As these plants have evolved in freshwater, appreciable amount of salt and/or salty water must be a foreign condition to which a plant has to adapt if it can. Let us examine what salt would cause.
I have come across the comments of several aquarists saying that they just cannot grow even the easiest of aquarium plant. When I read such comments it comes into my mind that ‘1 teaspoon per 10 gallon’ salt addition advice. Salt does not evaporate from the aquarium once it is added. More salt with water changes and topping up, if unregulated will simply increase the salt content to a level where it shall make it hard for freshwater plants to survive.We know that higher amount of soluble solid content increases the internal pressure in the water, demonstration of osmosis in physics have shown how water with lesser amount of solids in solution tends to equalize by escaping through a semi-permeable membrane into a more concentrated solution on the other side. The outer skin of an aquatic plant is semi-permeable. So when we add salt to the freshwater aquarium in any appreciable quantity, there is a chance that a plant will loose its internal water to its surrounding. In other words the plant will wilt.The practice of adding salt (a.k.a. Sodium Chloride, rock salt, table salt, solar salt, aquarium salt) to freshwater aquariums has been around almost as long as the hobby. There are several reasons why hobbyists add salt to the aquarium, stress reduction, medicating, adding hardness, and for fish commonly found in brackish water. It has become a common practice for employees of big box stores to tell all of their freshwater customers to add a teaspoon of salt per 10 gallons (38 l). This is not a practice most advanced hobbyist partake in, nor one recommended. Before you add salt to a freshwater aquarium, you should understand why you are doing so, and any possible side effects.So next time those of you who find it hard to keep plants in your aquariums, try your hand at planted freshwater aquarium, go lightly with salt, and see how easy it is to grow plants. A sand and gravel substrate to anchor the plant, and a little light about 1.5 to 2 watts per gallon and you will enjoy the beauty of a planted aquarium and your fish too will thank you for it. Zeolite is often used in aquariums to remove ammonium/ammonia from solution. When salt is added to the aquarium it prevents the mineral from removing the ammonium/ammonia. Therefore zeolite is only effective in freshwater. Zeolite can be recharged by soaking it in saltwater. When soaked in saltwater it exchanges the ammonium/ammonia with salt.