Question: how much hydrogen peroxide to put in pond?
Answer: 2007), results suggested that use of 3.1 mg/L hydrogen peroxide for one hour may be effective for control of external bacteria, and use of 6.5 mg/L or more for one hour may be effective for control of external flagellates, including the parasite Ichthyobodo sp., in swordtails (Xiphophorus hellerii).