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Originally Posted by Ironloach
Just a thought, will this work with a foam (the one you stuff in filters) instead of a mesh?
I've noticed that the gravel-vacuum diffuser model uses foam to diffuse the CO2. Was just wondering if the same concept will work with Fedge's model.
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Pretty much anything that doesn't let CO2 bubbles go through, but would allow water to is doable. I have a very fine nylon fish net that works very well.