Professor's Nutrients - Hydro Clay Balls Athena Modular 5-Piece SystemIncludes interchangeable grinding

Modular 5-Piece SystemIncludes interchangeable grinding plates for both fine and coarse grinding — switch textures with ease

adorned with a captivating marijuana leaf design

Self-supporting square bottom design Strong marine-grade stitching on handles and quad-stitch seam

Replace your original 150 micron screen or try the 220 micron

co-enzymes and vitamins to aid in plant development and promote healthy beneficial bacteria and mycorrhizal activity

Professor's Nutrients - Hydro Clay Balls Athena Modular 5-Piece SystemIncludes interchangeable grindingHydro Clay The Ultimate Growing Medium Available Sizes10L and 50L Professors Nutrients Hydro Clay is a premium growing medium made from 100% natural lightweight expanded clay aggregate, also known as LECA. Formed into uniform 8 16mm round pebbles, Hydro Clay is lightweight, porous, and designed to improve aeration, drainage, and root development for healthier plants. Ideal for a wide range of growing applications, Hydro Clay can be used on its own or