I am getting a 75 gallon tank and have been doing research trying to learn how to do it. I have a lot of questions. I am planning to do fresh water because from what I can tell it will be too much money for me to do saltwater. I would be willing to put in the work but I am going to do fresh water and get experience until I have the money to convert. I just want color! I need to know how to fill my tank!