Can saltwater fish and freshwater fish be swapped back and forth?

Question

Why do this swapping? We cannot catch and eliminate parasites one by one, so to kill the parasites off can I move the fish living in saltwater to freshwater and vice versa every two weeks? By the end of the month the parasites will all be dead and the fish healthier?

Answer 1

i've never heard of that. parasites? Isn't there just a solution you can put in?  

Answer 2

No because it will die.

Answer 3

No. all the fish will be dead and any microscopic bateria will be in both tanks. It's like saying you will take a living air breathing human and give them nothing but helium to breath!!!

Whoever emailed that horseshit didn't want it to be out there in the open to get ripped apart. So--That said-------don't switch them back and forth. Unless you want to be tortured too.

Answer 4

No. Their cells are only adapted to live in one environment. They have specialized organs that allow them to maintain a certain water level.

Freshwater fish need to rid the body of excess water and saltwater fish need to keep their water inside.

Water always wants to move from an area of high concentrations to low concentrations so with freshwater fish the water is always trying to move into them because they have other solutes in their body therefore the water concentration is lower, and with salt water fish water wants to leave them since the concentration of water outside is lower since it has solutes dissolved in it (salt)

You can put a small amount of aquarium salt in freshwater tanks to ward of some parasites and help fin rot but be careful about it and follow the directions on the container. And only use aquarium salt, not table salt.