Description RESUN Bio Balls are an environmentally made plastic that can be used in both fresh water and marine tanks for biological filtration. They are designed with a large number of flexible spikes to maximize surface area for the colonization of aerobic bacteria. Water can pass through them easily, allowing a constant flow back into the aquarium. They are light weight and can be used in any filter.
RESUN Bio Balls 40mm; * Quantity 100 Balls * 40mm Diameter * 100 Balls Is Approximately 5 Litres * Can be used in any Canister or Sump Filter * For Fresh & Salt Water
RESUN Bio Balls 26mm; * Quantity 100 Balls * 26mm Diameter * 100 Balls Is Approximately 1 Litre * Can be used in any Canister or Sump Filter * For Fresh & Salt Water