are saltwater tanks hard to keep up?

Answers:
Yes, in general they are significantly harder than freshwater aquariums. You should probably practice with freshwater ones and understand how to keep your fish from killing themselves before starting on saltwater ones. You may also need special kinds of filters for saltwater aquariums, although I'm not sure.

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The rule of thumb is the bigger they are, the less work. Also you need to have money for protein skimmers, live rock, special lighting, etc. I have found with my saltwater and reef tanks that if a fish, coral or anemone is missing I feel better just saying it moved out. That way I dont get upset about losing fifty bucks when one is gone after a week or two.
If you like money pits, saltwater tanks are for you..

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saltwater tanks are extremely hard to care for.
Although there is more steps than establishing a freshwater aquarium, many of the techniques and equipment are the same.

Planning is the logical start to setting up a new saltwater aquarium, although some people see this as a form of homework. The truth is. It ought to be fun! With this site I hope to demonstrate how to plan, equip and establish a saltwater aquarium for those just coming into the hobby as well as help for those who struggle to keep it maintained.

http://www.saltwater-aquarium-guide.com/.

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yea defintly. you have to have a lot of times on your hands, and you have to be an experienced fish owner. but it sucks, cuz all the coolest fish are saltwater fish :(

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They are easier than freshwater to set-up, but harder to maintain. Also, they are definitely more expensive to start and keep up. The bigger the easier to maintain.

Go to "About.com" and follow their links to starting and maintaining a marine aquarium. They have lots of really good info.

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There are a lot of other parameters to keep your eye on, but typically after the Nitrogen cycle completes - it's a fairly routine maintenance plan to stick with, and you'll be ok.