You simply fill the container with 1 litre of Guanoboost up to the level indicated. Simply attach your hosepipe to the sprayer bottle with a quick coupling connection. Then you open your tap and water starts to flow through the sprayer the force of the water will suck the guanoboost into the sprayer and mix it with the water at the correct ratio and spray over your lawn and plants. 1L of guanoboost will then cover 400m2 of your lawn and garden.