Aquarium is another name for a fish tank
You don't buy the fish. Unless, of course, you have another tank that is ready.
Scoop all your fishes to another tank or tub of water and clean the fish tank just as you would normally without the fish
Not unless you had another fish in there.
A betta fish? You can't or they will kill the tank partner
If you are going from the pet-store's tank to yours you should place the whole bag into your tank for at least 30 minutes then release the fish. If you are going from your tank to another tank you should wait until the tanks are the same temperature then go from one tank to another.
Finfish is another name for fish.
An aquarium
Aquarium.
You simply call it whatever you wish to call it. I have a fish tank called Claud.
the stuff that builds up on your fish tank is called ''algee''
Another name for a flying fish is a Ray-Finned fish.