Fzone Mini/Nano Lily Pipe Skimmer Set (13mm IN/OUT) – Fzone Studio

IAFVKAI 13mm Glass Aquatic Inflow Lily Pipe with Surface Skimmer for Aquarium Filter 1/2 i.d. (12/16mm) Tubing and Stainless Steel 90cm Flexible Cleaning Brush for Aquarium Planted Tank : Pet

Fzone Stainless Steel Lily Pipe Inflow and Outflow 12/16mm – Fzone Studio

Mini Size For Nano Tanks. Only 165mm(6.5in) height. It can be hold in one hand. Perfectly match with nano tanks and small tanks High Quality Glass

FZONE Aquairum Mini Glass Skimmer Lily Pipe for Mini and Nano Tank Filter Pipes

JARDLI Glass Lily Pipe Outflow & Inflow Surface Skimmer for Aquarium Planted Tank (13mm for 12/16mm (1/2'' i.d.) tubing) : Pet Supplies

Mini Size For Nano Tanks. Only 165mm(6.5in) height. It can be hold in one hand. Perfectly match with nano tanks and small tanks High Quality Glass

FZONE Aquairum Mini Glass Skimmer Lily Pipe for Mini and Nano Tank Filter Pipes

JARDLI Glass Lily Pipe Mini Inflow Outflow Set 10mm for 9/12mm Tubing - Nano Aquarium Planted Tank Aquascaping : Pet Supplies

The flow in the tank as well as the movement of the water surface are rather moderate. This prevents driving out too much CO2, which is an essential nutrient for the aquatic plants. The water surface is only gently agitated so that the gas exchange is still slightly increased. In a freshly set-up aquarium often a small vortex will form at the upper end of the outflow if the filter performance is sufficient. It is often stated, that this vortex is permanent and removes surface scum.