Swell Control Green Sludge 2 Pack. Pond Clear Water Treatment and Sludge Remover

Swell Control Sludge is an efficient and cost-effective way of keeping sludge at bay in your garden pond. Sludge is a build-up of biological waste from fish, plants and other pond debris. If left unchecked, it can cause deadly ammonia spikes in your pond. Just a single pack of six nuggets can treat up to 6,000 gallons/27,276 litres of pond water. Simply place a nugget straight into your pond and/or filter. The beneficial bacteria packed into these nuggets will then help to breakdown the organic material in your pond. These nuggets are convenient and easy to use, with no measuring needed. They're economical too, and much cheaper than other alternatives.