Reef tank is a saltwater tank with corals and anemones and inverts. There is another type of tank called a FOWLR it stand for Fish Only With Live Rock it has fish and live rock only as the name states.
Yah the only difference is the things you put in Reef tanks are different from like things you would put in a aggressive because like corals and anenomes cant go in with triggers, eels, sharks etc.
Reid
The reason for the difference is that some fish such as angels or triggers for example are not reef safe as they will eat or nibble on your costly corals/inverts.
