Clay Pebbles & Seramis
Canna Aqua Clay Pebbles: expanded clay for hydroponic systems, the top layer of pots, and mixes that need more drainage. Baked, inert and reusable.
In StockCanna
£9.86
About Clay Pebbles & Seramis
What they're for
Clay pebbles hold no food and little water, which is the point: in a flood and drain, dripper or deep water culture system the nutrient solution flows through and the pebbles just hold the plant up and let air reach the roots. In a pot they make a drainage layer at the bottom or a dry mulch on top that keeps sciarid fly off the compost. Mixed 60/40 with coco they make the free-draining medium Autopot systems like.
Using them
Rinse the dust off before use and soak them in pH-adjusted water. After a crop, wash and reuse them; a run through a mild disinfectant makes them as good as new. Net pots for pebbles are under Pots & Trays.
Growers' Guides
- Flood and Drain Systems: How Ebb and Flow Hydroponics WorksHow flood and drain (ebb and flow) hydroponics works, the IWS systems we sell, what to grow in, tank care, and flood and drain vs DWC, NFT and Autopot.
- Clay Pebbles and Rockwool Cubes: How to Use Them in HydroponicsWhat clay pebbles and rockwool are, how to rinse, soak and plant in them, which hydroponic systems each suits, and how they compare with coco.
- Coco Coir Guide: Choosing, Feeding and Reusing CocoWhat coco coir is, the coco mixes worth buying, how it compares with clay pebbles and rockwool, and how to feed and reuse it.
- Canna Aqua Feed Chart for Hydroponics: Doses and EC by WeekThe CANNA Aqua feed chart and grow guide for recirculating hydroponics: Aqua Vega and Flores A & B doses by week, the additives and the EC to aim for.