If you want a child safe, pet safe, fish safe, everyone safe solution to eradicate the sludge at the bottom of your pond, the Aquapro Bionatural Sludge Away 500ml, is the treatment for you. The Bionatural Sludge Away has been specifically designed with natural products, plants extracts and bacteria strains to ensure that there is no harmful effects on anything other than the sludge you want to get rid of. One 500ml bottle treats up to 12500L of water, meaning 1ml can treat 25L of pond water. This solution is designed to actively consume sludge, dead algae and naturally break down organic waste that collects at the bottom of your pond. Having sludge in the bottom of your pond can contribute to poor fish health and hold the nutrients needed to spur on an algae growth, so it’s best to deal with it immediately. Recommend to dose weekly for a month, and then monthly to maintain clear fresh water, whilst running a pump 24/7 to ensure effective results.