Water is life! As creatures in an aquarium need completely clean water to live a healthy life, biological, chemical and mechanical filtering is absolutely vital. To help you decide which filter is right for your aquarium, qualified biologist Barbara Klingbeil reveals everything you need to know about filtering. Plus, we'll also be introducing you to our new Tetra EX-Filter Plus external filter in a video and on the Tetra website. The complete sets are really easy to use and offer extremely effective filtration.