Black Vinyl Kink-Free Tubing, MM/UK Sizes - Sold by the Roll Diameter:51.0MM (~2") the outer chamber is where

the outer chamber is where biological treatment occurs

14lb BLR25A 758183125545 Large Pellet Growth

These replacement parts are for the Evolution Aqua Nexus pond filters

Multiple skimmers can be plumbed to one pump

24"H 20" x

Black Vinyl Kink-Free Tubing, MM/UK Sizes - Sold by the Roll Diameter:51.0MM (~2") the outer chamber is whereThis black kink free tubing is highly flexible and reinforced, won't crimp or collapse around curves or if buried under stones or dirt. Comes in a UV resistant, black color that makes it easy to hide and restricts sunlight, reducing algae growth inside the tubing. Metric sized, so may not fit well with American sized fittings Dramatically increases water flow