Learn more in "Foundations of Aquaponics" - an Upstart University course with over 12 hours of aquaponics education (just $9.99). See it here: http://bit.ly/2g6mArx The relationship between total surface area and volume has a lot to do with the effectiveness of different types of aquaponic media. Fibers tend to be one option which works incredibly well. Find out why in this slideshare.