Key Features Coarse Structure Designed for optimal bacteria growth Keeps pond water crystal clear and healthy Washable and durable 10L bag The Superfish Bio Balls are an effective filter media. Their coarse structure allows for maximum bacteria growth on their surface, increasing filter efficiency. The balls are incredibly durable and enable your pond to maintain healthy and crystal clear pond water. Specifications Diameter: Approximately 30mm Pack size: 10 Litres
