I know that this is a tropical forum but i was hoping someone might be able to help me out a little. My gf loves saltwater fish and her bday is coming up and i was thinking of starting her a 20g salt water tank with 2 clown fish in it. Nemo fish. I read u can start a 20g as long as u know what ur doing with fresh water pretty easy. What all am i looking to be using for filtration. I have heard u dont need a protein skimmer as long as u only have the 2 fish in it and have good biological filtration and that the only other piece of equipment ill need other then the same stuff i use for freshwater is the solinity test thing. Is this true or did i read up on a bad artical.