Using a unique two-stage process exclusive to us, this natural, microbial treatment starves algae of nutrients and digests the resulting dead organic matter, leaving your pond crystal clear. Step 1. Kick Start Oxygenator - natural bicarbonates and related substances release oxygen, starving algae and weed. You'll see results in just 3-4 days. Step 2. Pure Aqua - introduces a natural biome of bacteria to maintain pond clarity. These degrade muck and slime that has accumulated in the bottom of pond, clarifying water and establishing long term populations. Note that to work, the microbes needs the water to be 10°C or more to work - So use April to October. Pond Clear Pro 2 Step consists of two parts, Kick Start and Pure Aqua which contains specially prepared materials encapsulated with selected strains of bacterial cultures. These attract dispersed particles in your pond and form a core on which the organisms grow, assisting in the generation of sludge which settles out to leave clear