research, research, research.
FOWLR or Reef?
You will need a sump for it too, probably a 40G or so. A filter, protein skimmer, live rock, live sand, for a tank that size, probably 2 filters, a fuge.
SW is a lot more expensive than freshwater. It can easily cost you at least a thousand.
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Everything you have just read is out
of my own opinion and/or experiences.
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