http://www.fishlore.com/SaltwaterAquariumSetup.htm

From my understanding, you will need a protein skimmer if you are planning to have a reef tank. The live rocks or corals needs to be at a specific temperature preferably at 78-82 degrees. So if you don’t have an air conditioner, you should buy one because a chiller will cost you roughly around $400-500.00. You may be able to find chillers that are cheaper, but the average price range is listed above.

Please note that everyone has their own likes and dislikes, if you click on the link listed above, it’ll tell you what type of equipment should be used. If you need more information, you can search marine aquariums on wikipedia, it’s also very accurate.

I hope this helps you, thank you for asking…………..