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Joined: Jul 2009
Posts: 4,318 Likes: 6
Ambassador Lunker
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Ambassador Lunker
Joined: Jul 2009
Posts: 4,318 Likes: 6 |
So when it comes to an air pump what is the minimum I need in CFM? I have a 1 acre pond max depth is about 9 feet. I thought I remember reading I need at least 1.5 cfm but wasn't sure? Can anyone enlighting me on this. I don't want to under do my pump but at the same time I don't want overkill either as the price can get high quick.
Thanks,
The only difference between a rut and a Grave is the depth. So get up get out of that rut and get moving!! Time to work!!
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Joined: Jun 2007
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Ambassador Field Correspondent Hall of Fame Lunker
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Ambassador Field Correspondent Hall of Fame Lunker
Joined: Jun 2007
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Depends on what your diffusers require. If you are using membrane disc diffusers, they require a minimum of .5 CFM each to operate (max is 2.5 or 5 CFM depemding on slit size) I try to get 1 to 1.5 CFM per diffuser in case there is an air hog.
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Joined: May 2010
Posts: 8
Fingerling
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Fingerling
Joined: May 2010
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When I design an aeration system I try to achieve atleast 3 CFM at each diffuser. I do use the air stones from aquatic eco systems rather then the rubber diffusers. It is important to remember when sizing the pump for CFM that you will have frictional lose in the hose and atmospheric pressure due to depth of water.
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Joined: Jul 2009
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Ambassador Lunker
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Ambassador Lunker
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What did you just say me??? Ok I guess I need to read up more on this before I pull any triggers. Thanks for the help guys.
The only difference between a rut and a Grave is the depth. So get up get out of that rut and get moving!! Time to work!!
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Joined: Jun 2007
Posts: 7,099 Likes: 23
Ambassador Field Correspondent Hall of Fame Lunker
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Ambassador Field Correspondent Hall of Fame Lunker
Joined: Jun 2007
Posts: 7,099 Likes: 23 |
Always lots to learn...lol
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Joined: Nov 2004
Posts: 551
Ambassador <br /> Field Correspondent Lunker
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Ambassador <br /> Field Correspondent Lunker
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Posts: 551 |
With 9 foot of depth and assuming you will only require 100' of 5/8" air line, the pressure required will be 4.16 psi.
Everyone is right about the cfm depending on the diffuser types. Rubber membrane be it disc or tubes require 0.5 cfm and the stones require 1.5-3 cfm.
A round, 1-acre pond should only required one diffuser station unless something like intense aquaculture is being done in the pond.
Best fishes! ><((((*>
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Joined: Jul 2009
Posts: 4,318 Likes: 6
Ambassador Lunker
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Ambassador Lunker
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Hey thanks Cary. The pressure at 9 feet is a good thing to know with the 100 foot hose at 5/8 in. I been looking at pumps that push 6.5 psi so I guess I am ok there I figure I could put the diffuser at the 8 foot mark and be in the 3.7 range of pressure then my pump wouldn't work so hard.
The only difference between a rut and a Grave is the depth. So get up get out of that rut and get moving!! Time to work!!
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Joined: Jun 2007
Posts: 7,099 Likes: 23
Ambassador Field Correspondent Hall of Fame Lunker
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Ambassador Field Correspondent Hall of Fame Lunker
Joined: Jun 2007
Posts: 7,099 Likes: 23 |
RC51. look at the CFM curve for any low pressure pumps...Most state the max CFM at 0 psi....A 6.5, 5cfm pump may only put out .5 cfm at 5 psi.
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Joined: Jul 2009
Posts: 4,318 Likes: 6
Ambassador Lunker
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Ambassador Lunker
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Hey Rex thanks I will. Like I said i am not pulling any triggers to soon on this. I want something at a decent price but I also want to make sure I get the right thing too.
The only difference between a rut and a Grave is the depth. So get up get out of that rut and get moving!! Time to work!!
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