NT Labs Algae Stopperz - Barley Straw Pellets Algae Stopperz from NT Labs are an effective natural algae and blanket weed treatment in the form of barley straw pellets. Algae stoppers are easy to use; simply sprinkle around the edge of the pond margins where they will sink and begin to take effect in around 2 weeks to create the ideal conditions for fish and plants alike. NT Labs Algae Stopperz can also be placed in a pond planting basket or net and left on a ledge or in a waterfall where water can flow through. Algae Stopperz work effectively in either natural or filtered ponds. This treatment is free from pesticides making it safe for fish and plants and can be added regularly and cannot be overdosed. Clears and controls green water algae and blanketweed Pesticide-free Natural algae control No mess Easy to use Plant and wildlife friendly 2.5 litres treats; 2,000 gallons (9,000 litres)
