So there is a disease on aquarium fish called the white spot disease (sometime called Ich disease). It make fish to die very quickly. One way to treat that disease is to add salt to the fish tank. Something like 1 table spoon per gallons. Now I have done this many times to treat fish disease and it very effective. But one thing I don’t understand is that. Given that all my fish are fresh water fish, how come they can still survive just fine in salt water?. Like for months already
In: Biology
Simple answer: They only have to tolerate it for a short time.
Longer answer: It’s not as salty as ocean water, nor is it the same type of salt. Ocean water has a salinity (salt concentration) of 3.5%. Your tank should have a salinity of less than 1%.
Seawater is made up of many different salts, such as NaCl (sodium chloride), MgCl2 (magnesium chloride), MgSO4 (magnesium sulfate), and KCl (potassium chloride).
Aquarium salt, which should only be used for a SHORT amount of time, is pure NaCl. If you use it for too long, your fish will die.
https://www.aquariumcoop.com/blogs/aquarium/aquarium-salt-for-sick-fish
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