Iv just bought a new 40 gallon (47USgallon) tank and I'm thinking about setting it up as a marine tank. Would I need live rock to cycle the tank? Would I need some extra filtration? I have an internal filter and an external filter doing 200lph? Also what kind of fish are good starter fish? I've kept fresh water before bit I'm new to marine keeping. Any help and advice will be much appreciated. Thanks!
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