Sera Air has 1 connector and is suitable for oxygen enrichment by means of an airstone, for operating air driven filters (e.g. sera internal filters L), or air driven moveable decoration elements.
The Sera Air 275R Plus has 2 connectors and is suitable for oxygen enrichment by means of an airstone, for operating air driven filters (e.g. sera internal filters L), or air driven moveable decoration elements.
The Sera Air 550R Plus has 4 connectors and is suitable for oxygen enrichment by means of an airstone, for operating air driven filters (e.g. sera internal filters L), or air driven moveable decoration elements.