Freshwater Fish Tanks Vs. Saltwater Fish Tanks - Which Is Right For You? ... A saltwater aquarium requires Marine fish which, although much more colorful than the freshwater fish, are very expensive... In a saltwater aquarium, you'd most likely have live rock which can be very expensive but is a great biological filter and makes setup and maintenance of the saltwater tank a little bit easier... If you don't want to bother with live rock, then you should buy a protein skimmer which will help remove organic waste from a saltwater aquarium thus helping to clean the water and provide a healthy environment for your fish...
How To Setup Saltwater Fish Tank ... First thing before entering the hobby is the need to understand that fish are animals just like a cat or a dog and responsibility comes along, responsibility expressed by the need to perform water changes, feeding the fish on daily basis, monitor water condition end even to spend some money on them (fish food, media, medicine), in saltwater aquarium expenses are something you cant ignore, recommended to know this before you start your aquarium setup...