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

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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

4 Answers

Anonymous 0 Comments

How can you survive breathing in car exhaust? Or eating plastic?

The way to survive bad things is concentration and dilution. 1 part per 100 is much worse than 1 per million or billion. The fungus or whatever pathogen is smaller and is affected more quickly than the fish.

It’s like chemotherapy. You’re trying to kill the cancer before you kill the host. But eventually, you will kill the host if you’re not careful.

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