I think the best thing you can do is let the tank sit for three days ,full of water with the pump going. If you don't want to wait you should at least add some Chlorine remover before adding the fish. You can find Chlorine remover at any pet store. Just takes a few drops. I usually do both; add the Chlorine remover then let the tank sit a few days.
U buy tropical fish and get a background and then that is how u can do that
no tropical fish need warm water
Yes! You should never use chemicals to clean your tank, especially while there are fish in it.
yes
No. Not in the traditional definition of the tropical tank. A tropical tank is a freshwater aquarium. Regal Tangs are saltwater fish and go in a saltwater tank (marine aquarium).
why not
Probably the fish. I would not put a crab in a tank with tropical fish unless they were a LOT bigger than it was, and it was not going to grow any larger.
Use a tropical fish tank, preferably new. That way you know that it should not leak. Try to avoid using a tank that was used for something other than tropical fish. I prefer glass tanks over acrylic because they are less likely to mark or look dirty and they are easier to keep clean. Most aquarists will tell you to start off with a small tank and as you enjoy it more and more, you can opt a larger tank. When I started into tropical fish and as I bought larger tanks I used the smaller tank for breeding. Tropical fish tanks and supplies are available in most pet stores that sell tropical fish.
No, not if you intend to put fish into the tank without treating the water first. Drinking water contains chlorine and/or other chemicals that will irritate, sicken or kill tropical fish. You have to neutralize the chemicals, or put water in that doesn't contain them in the first place; either procedure is OK. There are products available that are not expensive that will make ordinary tap water safe. You should also include the prescribed amount of special salt, even in fresh water tanks. This is soothing for the fish.
if you have a tropical fish or a filtered tank than yes you do need a light
Only if it has a heater in the tank other wise the tropical fish will die. They are warm blooded instead of cold blooded.
No, dry clay is not safe to put in a fish tank because clay is made up of chemicals and when you put that substance of chemicals into water the chemicals diffuse (spread) and that could harm the fish. But if you don't have any fish in the tank its OK to put hard clay in it.