Matala introduces 3 new sizes of DISC diffusers with a weighted base, the MD-3W, MD-5W and MD-7W. These convenient "Self Weighted" Rubber Membrane Disc Diffusers stay put on the bottom of the pond and are low back pressure with low maintenance. The weight is built on to the diffuser! These are Ideal for pond air pumps between 3 lpm up to 65 lpm. The MD-3W has: A 3/16" connector barb for aquarium style air pumps; A silicone rubber disc diffuser, that is soft and easy to clean; Very low back pressure; Flow rates between 3 to 5 lpm / 0.1 to 0.2 cfm; Weight of MD-3W is 0.4 pounds; A great choice for small ponds and aquariums! The MD-5W has: A 3/8" connector barb for larger air pumps; EPDM rubber disc diffuser, that is easy to clean; Very low back pressure; Flow rate is 8 to 35 lpm / 0.3 to 1.2 cfm; Weight of MD-5W is 1.75 pounds; Great choice for small ponds! The MD-7W has: A 3/8" connector barb for larger air pumps; EPDM rubber disc diffuser, that is easy to clean; Very low back pressure; Flow rates for MD-7W is 15 to 65 lpm / 0.5 to 2.3 cfm; Weight of MD-7W is 3.3 pounds; A great choice for small ponds! Specification MD-3W MD-5W MD-7W Disc Body PP+Lead Membrane Silicone EPDM Connection 3/16" 3/8" 3/8" Dimensions: Dia.(in) 3 5 7 Weight (lbs) 0.47 2.36 3.32 Click here for Matala Diffuser Flier!
