The de-gassing tower is also called boi-tower or fixed film biological filter tower, it is a simple, cost effective alternative to other types of moving media filters. Carbon dioxide causes problems in recirculating aquaculture systems without aeration or degassing. Carbon dioxide must be removed, or it can build up to levels that are dangerous to the fish and to humans if the fish are raised in a closed building, de-gassing tower performs great on the carbon dioxide removal provided by a counter current airflow, an added profit is its oxygenation function, the towers can continuously oxygenate the water as it trickle down the media.
