Our compost activator is a mixture of marl (powered sea shells), gypsum & paramagnetic rock. It provides readily available nutrients to all those friendly, hard working bacteria that decompose raw waste into ‘black gold’. Directions: Sprinkle on a pinch each time you add kitchen waste to the compost bin. 1/2 kg. Price includes extra for shipping.CANADAIN ORDERS ONLY BACK IN STOCK BY END OF JANUARY.