One of the best filters on the market. Won't use anything but pinky filters on all of my tanks, both salt and fresh water. I use them in my filter floss cup in my reef tank, HOB filter and canister filters on my fresh water tanks. Water has never looked so clean. Filter catches more debris and particles then any other filter I've ever used! I would highly recommend this product to all aquatic hobbyist. Can't beat the quality, customer service or the price. Thank you Pinky Filters!