Hydrogen Peroxide 6% is used for the re-oxygenation of pond water after a treatment Such As Potassium Permanganate. It can be used to increase the oxygen levels and remove the discoloration from the pond water after a course of Potassium Permanganate which oxidizes from pink to brown. This can also be very useful when applied to pond water prior to the removal of sludge and detritus. The hydrogen peroxide will neutralize hydrogen sulphide released from the sludge and detritus being removed. It has excellent oxygenating properties with instant results.