Lily Pipe P (Outflow) With the image of a lily flower, it looks elegant, yet it is also very functional. Lily Pipe creates an ideal water flow for the growth of aquatic plants. Handmade product, shapes are slightly different. Moderate water circulation evenly within the aquarium is essential to maintain the water quality and prevent algae appearance. However excessively strong out flow of the power filter works negatively, hindering healthy growth of aquatic plants. Lily Pipe Outflow is hydro-dynamically designed to create a moderate circulation of water within the aquarium ideal for the growth of aquatic plants. *made by glass *does not disturb the appearance of aquarium by being TRANSPARENT *it has a special shape good for aeration Sizes included: Item: P-2 Pipe diameter (mm) Ø12/13 Outflow size (mm) 40 Aquarium size (cm) 45~60 Item: P-4 Pipe diameter (mm) Ø12/13 Outflow size (mm) 50 Aquarium size (cm) 90~120 Item: P-6 Pipe diameter (mm) Ø16/17 Outflow size (mm) 50 Aquarium size (cm) 180 #ADA #adapipes #pipes #aquascapingneeds #scapehorizon