That depends, of course, on the size of the tank and what you put in it.
A small tank such as a nano tank or a pico tank, is not too expensive to keep up.
There are many corals you can have without spending an arm and a leg.
Also some people have fish only which in general is less expensive.
The salt water can be purchased or made at home.
You needs light which can be very expensive for LED units or much less reasonable if you purchase lights such as T5s .
It is possible to own a salt water tank and not spend a fortune keeping it up.
put regular water in and and put your own amount of salt in it so it won't be a lot of salt
yo its crazy.it defenetly need salt water to live.but you can make your own salt water at home by adding much salt
I cannot use the water from your tank as I have my own but thank you for offering it
No. Water and salt on their own are compounds, but together they are a mixture.
One has a higher salt concentration....try to figure which one that is on your own.
If your water comes from a well and you have your own pump and tank. The tank may be waterlogged.
Water is pumped in by the municipal water system or by your own pump and pressure tank.
No you don't.
Salt
No. Chlorine will break down on its own...eventually....but it will take days and days. (And your fish would be dead by then.) If you have a fish tank, you need to buy a bottle of dechlorinator - it is not expensive.
No you will not have a salt water pool. yes you will have salt water but the actual electronic plates found in a genrator converts the salt in the water to chlorine to sanitize the pool water. A: You have to have the mechanical device to produce the chlorine in a salt pool. THE SALT A MEANS TO PRODUCE CHLORINE FOR YOUR POOL!
yes because you can change the states of each and physically get them back to its orginial starting point. for ex: water is a liquid and you can change it to a solid then back to a liquid all by physical means and salt water can be physically evaporated so the water will evaporate and the salt will remain