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Joined: Mar 2009
Posts: 814
Lunker
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Lunker
Joined: Mar 2009
Posts: 814 |
Do the membranes wear out? Could a membrane cause less resistance (back pressure) if it has been in use awhile and the slits have become larger or the rubber less elastic?
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Joined: Jan 2009
Posts: 28,698 Likes: 892
Moderator Ambassador Field Correspondent  Lunker
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Moderator Ambassador Field Correspondent Lunker
Joined: Jan 2009
Posts: 28,698 Likes: 892 |
If it happens again next year, I'm thinking of having it indoors at the local conservation club that is 1/2 mile away as the crow flies. Eat there too, then we could caravan to my pond for the hands on part.
No worries about inclement weather then!
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Joined: Jun 2008
Posts: 6,980 Likes: 15
Ambassador Lunker
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Ambassador Lunker
Joined: Jun 2008
Posts: 6,980 Likes: 15 |
Do the membranes wear out? Could a membrane cause less resistance (back pressure) if it has been in use awhile and the slits have become larger or the rubber less elastic? A few years ago I had a couple 9" membrane diffusers...off brand from somewhere, and I put full compressor pressure into those discs. Around 10 psi. After a year, the membranes had stretched out to the point that when the air was turned off, they were "loose" on the discs, stretched out big time. I replaced those, but held onto them as I wanted to take em' apart. I never did, and I rediscovered those diffusers while cleaning out a shed this spring. The membrane had "shrunk"? back to normal size after 3 years, and was taut once again. I can't imagine they would hold their shape if I tried to put air to them again, but at a lower, more acceptable psi, who knows.
"Forget pounds and ounces, I'm figuring displacement!"
If we accept that: MBG(+)FGSF(=)HBG(F1)
And we surmise that: BG(>)HBG(F1) while GSF(<)HBG(F1)
Would it hold true that: HBG(F1)(+)AM500(x)q.d.(=)1.5lbGRWT?
PB answer: It depends.
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