Re: [Killietalk] Air pump advice

["Markus Brown" <thefishbiologist at charter_net>]

Hello there!
There would be several things to consider with your issue. The LT26 pump you 
have is a diaphragm driven pump that, according to the AES web site puts out 
a maximum of 4.25 CFM. This would be more than enough for 30 out lets, at 
moderate air levels. The problem with these compressors is that the 
diaphragm usually last a year or two and then your putting more money into 
them. They are normally noisy as all heck and run very hot! The blower you 
are considering needs special set up considerations. It will produce, as you 
know, a great deal of CFM at lower pressure and run more than a hundred out 
lets if necessary. This blower needs a much larger diameter of pipe, I would 
recommend 1 1/2"-2"PVC as apposed to the 1" diameter PVC for your 
compressor. The blower needs to be bled of any excess air, as well as your 
compressor, so be careful of back pressure. The blower your are considering 
will really use electricity! But all big compressor's will suck the juice, 
so it really boils down to how many out lets you think you will end up 
having and how much money do you want to spend on electricity and how quite 
you want your room! I think most folks here on this list, including myself, 
would recommend a linear piston pump for applications as large as 20-150 
outlets. They are efficient, produce plenty of pressure for very deep 
applications with air stones and are very quiet! the only thing I am not 
impressed with is the time it takes a LPP to get up to pressure. When the 
power goes out here in my system, I have to go through and re adjust some of 
the air out lets because the pressure change. Not a big deal, but something 
I don't experience with blowers, or diaphragm compressors.

I hope this isn't to jumbled and has some info that helps;) Jehmco is a 
great resource for professional info on compressors! If you go with a 
Blower, I would recommend the Whitewater brand from AES.

Markus
----- Original Message ----- 
From: <bill_martin at und_nodak.edu>
To: <killietalk at aka_org>
Sent: Friday, November 04, 2005 6:21 AM
Subject: [Killietalk] Air pump advice


> Hi all,
>     I recently decided to change over from power filters on all my
> tanks to air operated filtration.  I hope I'll be able to save some on
> electricty and I won't have as big an expense when I add tanks.
>     I bought a used Whitewater LT26 pump and haven't finalized my
> manifold system.  The other day my local pet store gave me their old
> Spencer Vortex Blower (model no. 006S) for a promise of nice guppies
> and black angels.
> Now I have a pleasant predictament. Which pump should I keep and which
> should I sell.
>     The Blower was run with out an intake filter and needs a few parts
> replaced.  While either pump will meet my needs,  I'm thinking the
> blower might be the one to keep.  It has a capacity of 12.4 CFM at 14"
> H2O and a maximum pressure of 25" H2O.  The LT26 has a capacity of
> about 5 CFM at 0" H20.
>     Right now I'll have about 30 outlets, ten of which will be in
> tanks 18" deep.  I'm leaning towards keeping the blower even though
> it's a little more beat up. It delivers at least three times more air
> and I'll not get much more selling the blower than I'll get selling the
> LT26. Is this the right decision?
>     I haven't any idea how operation costs or noise level compare and
> may be ignorant of other factors as well.  If any one has had
> experience with both types of pumps, I would appreciate some input.
>
> Bill Martin
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