How can aquarium fresh water fish survive in water with salt?

Question

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

Answer 1

You’ll die if you drink salt water, but like, not instantly if you drink any amount of salt in water ever