Rubber Membrane Diffusers

diffuser expanded showing holesWhat is a rubber membrane diffuser? (video below) The diffuser part of the phrase is when a volume of air is broken down into smaller volumes of air. Sort of like a watering vase. There is the main storage area holding water and when poured out the spout it reaches small holes diffusing the water into smaller drops.

Rubber membrane diffusers have been around for some time now and used for pond aeration. They are what is used in new pond aeration system and to replace the old school stone diffusers that can plug up so quickly. Depending on the water quality of the pond the stone diffuser can plug up or need cleaned in as little as 2 weeks. Cleaning the stone diffuser or air stones generally use muriatic acid or as little as water and a brush being careful not to break the stone.

Rubber membrane diffusers offer easier cleaning which can be done right at the air compressor or if need be brought up to the surface and gently rubbed by hand or gloved hand.

Here at WhatPond we did start out using an air stone diffuser and yes it clogged up, took a few month but ended up tossing it instead of cleaning it and the second one broke during the cleaning process.

Once we got our proper sized aeration system it came with the rubber membrane diffusers. The bubbles where evendiffuser side view in water smaller than the stone diffusers, which is good because the smaller the bubble the more water it entrain into the bubble column.

Yes they did get growth on them but once you pull it to the surface and gently stroke the membrane the particles come right off. I’ve used a couple different brands or should I say styles of rubber membrane diffusers and the best so far and what I use today is from Airmax Eco. As seen in the video the air emits from all around the diffuser tube, this entrains more water from the bottom of the pond to the surface allowing the toxic gasses to escape and bring more oxygen to the floor of the pond.

diffuser in pond 2 and a half feet deepThe next thing I like is if a turtle, muskrat or who knows what ripped or harmed the rubber part of the diffuser, which is all we would replace. The other brands the whole diffuser would need replaced.

Be sure to watch the video for more details and see it in action.

I’m not sure why, but I usually ask my little woman to watch the video before I put it up, and for some reason I could hear her laughing a little more than normal. Comments are always welcome.

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For more information on pond aeration check out the FREE Consumer Aeration Report When you are ready to replace the old air stones shoot us an email using the contact page.

About the Author: Darrell Rhoades is the founder of A one man business, works full time in tool & die. It all started when he built his own pond for the family. Ran into pond issues and started the research with pond suppliers and conferences for pond management. He writes about pond building and pond management and sells pond management supplies, aeration & fountains and Practical hands on experiences at . No physical store, but has items in stock.

Comments on this entry are closed.

  • gab Nov 16, 2013 @ 15:43

    what are the dimensions of the rubber membrane diffuser? what size holes in the membrane?

  • Darrell Rhoades Nov 17, 2013 @ 9:07

    It is called 6″ long with a 1/2 NPT the hole are a half mm. We are currently testing another material with different size holes and should have results once the ice melts off next spring. If you need any more details on the diffuser please let me know.

  • brad smith Sep 4, 2015 @ 8:49

    can these be used in the winter to keep water from freezing???

  • Darrell Rhoades Sep 6, 2015 @ 7:53

    Yes, The aeration systems are used to keep a hole in the ice to allow toxic gasses to escape during winter and provide oxygen and circulation during the summer months. Winter Aeration and further information on aeration you can either start with proper sized aeration or use the search option on the top of the website. There are plenty of manufacturers for aeration systems and we are here to help calculate and design a system for your pond if you wish.

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