Ista Rectangular Bio-Sponge Aquarium Filter (Large) Gravel Cleaners & Brushes Water-tight screw-on lid with gasket

Water-tight screw-on lid with gasket helps reduce leaks during travel

venturi and air path regularly

Basic mix rate: Dissolve 20 g per 8 fl

and tank walls

They are also useful for coral propagation and grow-out work because the flat shape makes it easier to position corals on the bottom of an aquarium

Ista Rectangular Bio-Sponge Aquarium Filter (Large) Gravel Cleaners & Brushes Water-tight screw-on lid with gasketIsta Rectangular Bio Sponge Aquarium Filter (Large) High Capacity Air Driven Filtration with the Ista I 149 The Ista Rectangular Bio Sponge Aquarium Filter (Large) provides increased sponge capacity for aquariums requiring dependable mechanical and biological filtration without the strong intake of a motor driven internal filter. Its tall rectangular foam block captures suspended debris while providing extensive surface area for beneficial bacterial