Check the listing for details. Cloverleaf Sludge Answer for Pond & Aquarium (ship from CA). Condition: New. Listed at 36.00 USD. 1 Liter Cloverleaf Sludge AnswerHelps convert sludge from fish pondsGreat on immature ponds and will help bring your filter to maturityAdd at rate of 100ml of Sludge Answer per 1000 liters of pond water Cloverleaf Sludge Answer is a live beneficial bacteria culture that helps to biodegrade the harmful solids that build up in the pond and the filter which can become a breeding ground for harmful pathogenic bacteria. These solids will also reduce the amount of saturated oxygen present in the water. Sludge Answer is highly recommended for use during periods of hot weather when a reduction in saturated oxygen levels is common, used on a regular basis it will help to maintain a healthy pond.Sludge Answer is the perfect follow up to the No.1 selling Blanket Answer to help reduce the residues left after application and should be applied once the blanket weed is no longer present.1 Litre - up to 5000 litres