The Serenity Biochemical Sponge Filter adds oxygen to the water while supporting colonisation of bacteria to assist with the breakdown of harmful waste like ammonia. It will provide the fish with a cleaner living environment.Sponge filters are particularly useful for breeding tanks or as a secondary filter in regular aquariums.Features: Adds oxygen as it filters Fits most external or top filters for pre-filtration Easy maintenance SIZES: Pico: Suits tanks up to 8Litres. Sponge size 4cm x 4cm.Nano: Suits tanks up to 40 Litres. Sponge size 5.5cm x 4.5cm.Small: Suits tanks up to 100 Litres. Sponge size 8cm x 6.5cm.Medium: Suits tanks up to 150 Litres. Sponge Size 6cm x 12cm.Large: Suits tanks up to 200 Litres. Sponge size 10cm x 12cm.Note: If using as a stand alone filter you will also need airline tubing and an air pump which are sold separately.
