The specific gravity is the amount of salt that is in the water and a hydrometer is the instrument that is used to find that out.So what is the "gravity" stuff and what stuff would I need for a new tank and what are begginer fish thanks
No problem and Big G pretty much covered it in post number six.Ohhhh okay thanks and what other things shouldd I have in say a 40 gallon salt water tank along with good beginner fish thanks