Malachite has been a go to treatment for many fish keeper for years and is often used in conjunction with Formalin for better results.
Use Cloverleaf Formaldehyde Answer at a 50% reduce dosage when used with Cloverleaf malachite treatment.
Check your water quality before adding any treatment to the water.
What Will Cloverleaf Malachite Answer Treat
Dosage rate of Cloverleaf Malachite Answer
Do not add any other medication to the pond for at least 14 days after the last treatment