Recently I had a hitchiker mystery snail come home with me! He came with a plant:) So when I did my last water change, I DID NOT add any salt, because I heard that will kill mystery snails. I also have an albino cori cat in that tank too, and I have heard that they do not like salt either, but he has been fine :/
What I'm wondering is, do I need to continue adding salt when I do my weekly water changes? I have gourami's in there and the above listed (plus a molly and an AD frog). It's a planted tank too.
I'm not even totally sure why they need salt in there, I've just always put it in there because I've been told to.
Half dose? None at all?
I vote for none at all. Salt isn't good for snails, and its really isn't good for plants. I have never used it, and my aquariums are all clean and healthy.
None at all. Salt is bad for plants, bad for scaleless fishes (which cories are) and IMHO adding salt to a tropical aqaurium just simply isn't a good idea at all.
I agree. Here, copied from another thread, is what I have previously written on salt.
Salt is detrimental to freshwater fish and plants in varying degrees. To understand why, we must understand what salt does in water.
Salt makes the water more dense than the same water without salt. The aquarium contains water. The bodies of fish and plant leaves also contain water [just as we do--we are, what is it, 70-some percent water?]. The water in the aquarium and the water in the fish/plant are separated by a semi-permeable layer which is the cell. Water can pass through this cell. When either body of water is more dense, the other less-dense body of water will pass through the membrane to equalize the water on both sides.
Water is constantly passing through the cells of fish by osmosis in an attempt to equate the water inside the fish (which is more dense) with the water in the aquarium. Put another way, the aquarium water is diluting the fish's body water until they are equal. Freshwater fish regularly excrete this water through respiration and urination. This is the issue behind pH differences as well as salt and other substances. It increases the fish's work--the kidney is used in the case of salt--which also increases the fish's stress in order to maintain their internal stability. Also, the fish tends to produce more mucus especially in the gills; the reason now seems to be due to the irritant property of salt--the fish is trying to get away from it.
I have an interesting measurement for fish. Dr. Stanley Weitzman, who is Emeritus Research Scientist at the Department of Ichthyology of the Smithsonian Institute in Washington and an acknowledged authority on characoid fishes, writes that 100 ppm of salt is the maximum for characins, and there are several species that show considerable stress leading to death at 60 ppm. 100 ppm is equal to .38 of one gram of salt per gallon of water. One level teaspoon holds six grams of salt, so 1 tsp of salt per gallon equates to more than 15 times the tolerable amount. Livebearers have a higher tolerance (mollies sometimes exist in brackish water) so the salt may be safe for them.
Plants: when salt is added to the aquarium water, the water inside the plant cells is less dense so it escapes through the cells. The result is that the plant literally dries out, and will wilt. I've so far been unable to find a measurement of how much salt will be detrimental to plants; all authorities I have found do note that some species are more sensitive than others, and all recommend no salt in planted aquaria.
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