Ecothrive Coco Clay Mix - 45 LitresHigh Grade 60 40 with a Dose of Charge The team at Ecothrive has sourced extremely high quality coco and clay pebbles for this medium, which has earned it the treasured RHP certificate. It's supplied pre rinsed and buffered, so you can use it straight from the bag, hassle free. And with an added dose of Charge, it will boost growth rates and provide a source of slow release nutrition. Great for flood & drain, run to waste, bottom fed and dripper