Today I set up a 20L saltwater tank for my Oceanography teacher. Because of limited resources, this was the biggest tank we could afford. It has a small biowheel running right now and will be upgraded eventually to a bigger filter. We are most likely going to be housing mummichogs in the tank (3-4 most likely). I have mummichogs in my tank at home but I have a 75 with a lot more space for them and a lot more funds for the tank. I know enough about salt water to make them happy, but does anyone have any suggestions as to make it better. I may buy a skilter I saw for sale for 15 dollars at a next week to better serve the tank. Tommorow a blue crab is going into the tank until his new tank can be finished.