A proper filtration system for the type of aquarium you are keeping is the main ingredient for aquarium keeping success. There are three types of filtration: mechanical, chemical and biological. How you apply the different types of filtration depends on the type of system you are keeping. For example, in a freshwater system carbon is used for chemical filtration whereas in a reef tank some sort of phosphate and/or silicate remover is used as those elements cause nuisance algae and carbon strips some vital elements that are essential for a reef. No matter what type of tank you are trying to keep, Custom Aquatic offers more than one solution for your filtration needs. Please call if you need assistance.