ProTerra is Hydrotek Hydroponics’ exclusive high drainage growing medium. Created for hydroponic growing, our custom blended mix of sphagnum peat moss, peat chunks, and coarse perlite are ideal for flowering plants, cuttings, and large container plants. ProTerra is naturally resistant to algae, includes a wetting agent, a balanced charge of macro and micronutrients, and is pH balanced with dolomitic and calcitic limestone.