Welcome to our ongoing series highlighting our Aquaponics Curriculum!
Over the coming weeks, we will be posting a series of articles covering the basics of each Curriculum Topic. Today, we are covering Topic 1, Lesson 3, Substrates for Hydroponic and Aquaponics. Each of these blog posts is aimed to give an overview of the subject and provide one or more critical thinking questions. You can find our first post in this series here. Enjoy!
A substrate, also called a medium or media, is a supporting material or base on which a plant can grow. The most commonly used substrates are: Rockwool, lightweight expanded clay aggregate, coco coir, coco chips, perlite, vermiculite, peat moss, lava rock, river rock, and sand. Some uncommonly used substrates include: oasis cubes, floral foam, growstones, pine shavings, pine bark, polyurethane foam, water-absorbing polymers and rice hulls. A good substrate supports the plant, allows for air flow, and is porous.