Salt waters are the hardest to use. Fresh water is the best to start with, even tho I had my share of problems with that.
Since you do have a salt water you need to..
At least once a month...
1. Clean the gravel
2. Change 15-20% of the water every couple weeks (make sure its dechlorinated and mixed before u put it in)
3. Use Marine Max to prevent disease
4. Marine clean to fight algae and keep gravel clean
Thats just a few of the basic things, but theres a lot more to learn if you want it to be successful. I reccomend going to Petsmart/a website with lots of info on the subject and reading up on it.
