I’ve never actually set up a proper freshwater fish tank before. I do have experience with guppies and bettas with some success. I know it might not be advisable to set up a Marine aquarium without mastering freshwater fish-keeping, but is it possible to do so? I’d like to jump right into saltwater aquariums as I’m not that attracted to the freshwater fish.

Yes it is possible. The general concepts are the same for SW vs FW. Saltwater is significantly more expensive and requires a great deal more work, testing, and continuous maintenence. Another major consideration is that you cannot stock a SW tank anywhere near the levels of FW so it almost always requires a large tank. Since you specifically mentioned fish and not corals, you will most likely need a large tank 90 gallons or more, unless you’re just interested in a clown fish or two.

The best advice I can give, is to do a lot of research before starting out. Research the requirements of the fish you want to keep. Research how to setup a saltwater tank, and how and what to test and how to maintain the tank. If you have a local fish club, it’s a great idea to join and get help and advice from local fish keepers.

Once you do decide on your setup, take it slowly.