Hello reefers! My name is Mark and im the inventor of the new M-Shark filter sock. just posting here to see what you all think of it before I begin raising any money to have it mass produced for you all. See this link to look at it in a bit more detail... http://sharkfiltration.com/blogs/news/17516441-could-this-be-the-end-of-the-nitrate-factory more info will be coming soon! Tanks!