Smooth Water Flow: Precise pore design balances the resistance of water flow to avoid clogging or interruption of flow, our filter floss aquarium ensures smooth water circulation Efficient purification: Our filter floss aquarium gradually adsorbs impurities through a multi-layer structure to maintain water clarity and create a stable environment for the aquarium to live in Safe: Our filter floss aquarium has no sharp edges or fibre shedding, and fits the shape of the filter to ensure a tight fit Durable: Our filter floss aquarium is constructed with elasticated fibres that are resistant to pressure and rinsing, and retain their fluffy shape and filtration properties over long periods of time Protecting the Pump: Filter cotton acts as a pre-filter for the aquarium pump. It prevents larger debris from entering the pump and potentially causing damage or clogging.