What is it and what does it do? I am considering buying a 180g from a guy and he wants $250 extra for the skimmer. Do I need it? Is it worth $250 used? I'd rather ask here than ask him and have him try to talk me into buying something I don't need.
Yoji_步骤;1890770; said:It allows for the removal of certain types of dissolved organic compounds from the water. I assume your setting up a SW tank correct?!