NT Labs Pond Sludgeclear Be the first to review this product.   POND SLUDGE REMOVER. Use when there is a build-up of sludge on the bottom of the pond, use after addition of algae and blanket weed treatments. Sludgeclear is a blend of enzymes and bacteria designed to digest organic material leading to a cleaner pond and filter with fewer opportunities for disease-causing organisms to hide. Sludgeclear supports and encourages the activity of the biological filter bacteria. 250ml treats 4550 Litres Size* 1L 250ml 500ml Price : R365.00R325.00 Discount : R40.00 (10.96% off) Qty :- 1 2 3 4 5 6 7 8 9 10 11 12 Add to Cart IN STOCK, Usually Leaves Warehouse the Next Business Day. Our office is closed from 24 December to 5 January. Orders will be dispatch from 6 January.