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Re: [APD] Re: Leaky Eheim (Dirk.Matthys@toyota-europe.com)



Haven't seen any o-rings turn to goo in 30 years of using
the pertolatum. A very thin film is all that it needed help
the o-rings seat properly. Glycerin products like KY work
just fine too if you don't mind the glycerin. The
petrolatum is not good for "plain" rubber but the neoprene
kind used for o-rings dosn't seem to mind the jelly. Much
more likely that the o-ring will deform from being under
pressure "constantly" long before the littel bit of jelly
denatures it.

There are silicone based products but . . .  well, how
exotic do you want to get ;-)

sh
--- mikef100 at optonline_net wrote:

> 
> I have to totally disagree on the use of Vasaline or any
> other petroleum jelly product on a filter's O-ring.
> 
> Petroleum jelly (Vaseline) will actually degrade the
> rubber, causing it to break down and get "gooey" for the
> lack of a better term. That O- ring will eventually fail
> and the canister filter will surely leak.
> 
> Any non-petroleum based lubricant (K-Y Jelly fdor
> instance) would be a much better choice.
> 
> Mike Firrincili
> ----- Original Message -----
> From: aquatic-plants-request at actwin_com
> Date: Wednesday, February 9, 2005 12:01 pm
> Subject: Aquatic-Plants Digest, Vol 18, Issue 16
> 
> > Send Aquatic-Plants mailing list submissions to
> > 	aquatic-plants at actwin_com
> > 
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> > than "Re: Contents of Aquatic-Plants digest..."
> > 
> > 
> > Today's Topics:
> > 
> >   1. Re: AHSUPPLY's Reflectors (Vaughn Hopkins)
> >   2. Re: Leaky Eheim (Dirk_Matthys at toyota-europe.com)
> >   3. Re: AHSUPPLY's Reflectors (Liz W)
> >   4. Re: AHSUPPLY's Reflectors (Vaughn Hopkins)
> > 
> > 
> >
>
-------------------------------------------------------------------
> > ---
> > 
> > Message: 1
> > Date: Wed, 9 Feb 2005 07:11:19 -0800
> > From: Vaughn Hopkins <hoppy1 at surewest_net>
> > Subject: Re: [APD] AHSUPPLY's Reflectors
> > To: aquatic plants digest <aquatic-plants at actwin_com>
> > 
> > I don't have one of AH's reflectors, but from their
> website it 
> > seems 
> > that they consist of flat surfaces, not a parabolic
> surface.  So, 
> > there 
> > is no exact focal point.  I am going to make a version
> of what it 
> > appears to be, using wood and aluminum or stainless
> steel tape as 
> > the 
> > reflective surface (J.C.Whitney has stainless steel
> tape), and use 
> > it 
> > for a set of three parallel T8 bulbs.  I think I can
> increase the 
> > light 
> > output from the two outer bulbs in the set by as much
> as 50% over 
> > what 
> > a single white painted flat surface behind the bulbs
> would give.  
> > This 
> > will be a subjective experiment since I have no means
> of actually 
> > measuring the light.  With any reflector  you can just
> look at the 
> > light and if you see a nearly uniform, but wide area of
> light you 
> > are 
> > successful to some degree.  (Plus, look at all the fun
> you get by 
> > doing 
> > it this way!)
> > 
> > On Tuesday, February 8, 2005, at 10:52 PM, Chris Hotte
> wrote:
> > 
> > > Raymond Wong wrote:
> > >
> > >> Hi and thx everyone for their responses about the
> Ahsupply.
> > >>
> > >> But... Has anyone tried their reflectors with lights
> other than 
> > the 
> > >> ones
> > >> supplied with AH Supply say t8,t5's t12's?
> > >> Do you think it'll work since the cost is pretty
> good 
> > considering a 
> > >> 36" ish
> > >> reflector from Ahsupply is $20 USD + shipping, I
> really can't 
> > find 
> > >> any other
> > >> reflectors for about that price.
> > >> But is this reflector for one tube or can I use it
> for 2 or 
> > more t5 
> > >> tubes?
> > >>
> > >>
> > > After a short study on the subject,  here's what I've
> come to 
> > > understand so far.  The curved surface only works if
> the focal 
> > point 
> > > is used as a point of origin. It should give back a
> more or less 
> > a 
> > > uniform light distribution from it. The focal point
> is fairly 
> > obvious 
> > > and easily calculated with y=sqr(x)/4p, p being the
> focal point. 
> > It's 
> > > a good idea if it does in fact give back the %65 gain
> over 
> > rectangular 
> > > reflectors as stated at ahsupply. I for one cannot
> see why it 
> > > wouldn't.  However, as you step your light source out
> of the 
> > focal 
> > > point, you start to loose the benefit and hinder it
> with bounce 
> > back.  
> > > So, trying to cram in more bulbs into a parabolic
> reflector 
> > would 
> > > effectively jam it up and put it back on par with a
> rectangular 
> > > reflector.  I would even be willing to bet on the
> smaller the 
> > source, 
> > > and the more accurately placed, the more efficient
> the parabolic 
> > > effect.  On the other hand, the limit to effeciency
> gained by 
> > > placement would have to be defined by the diameter of
> the curve 
> > and 
> > > size of the litght source.
> > >
> > > Of course, when everything is said and done, just
> play with it 
> > and see 
> > > what you get. *grin*
> > >
> > >
>
http://usna.edu/Users/physics/mungan/Scholarship/ParabolicMirror.pdf
> > > http://www.jc-solarhomes.com/do.htm
> > > http://www.downeastmicrowave.com/PDF/dishfp.PDF
> > >
> > > Chris.
> > > _______________________________________________
> > > Aquatic-Plants mailing list
> > > Aquatic-Plants at actwin_com
> > > http://www.actwin.com/mailman/listinfo/aquatic-plants
> > >
> > 
> > 
> > 
> > ------------------------------
> > 
> > Message: 2
> > Date: Wed, 9 Feb 2005 17:09:09 +0100
> > From: Dirk_Matthys at toyota-europe.com
> > Subject: [APD] Re: Leaky Eheim
> > To: aquatic-plants at actwin_com
> > 
> > To my experience nothing beats "vaseline" as a cheap
> and available 
> > sourceof O-ring maintenance grease. I don't know if
> vaseline is a 
> > trade name or
> > actual product.
> > 
> > It is used for medicin type lubrication also. Doesn't
> dissolve in 
> > water.
> > Dirk
> > 
> > 
> > 
> > ------------------------------
> > 
> > Message: 3
> > Date: Wed, 9 Feb 2005 08:29:14 -0800
> > From: Liz W <satirica at gmail_com>
> > Subject: Re: [APD] AHSUPPLY's Reflectors
> > To: aquatic plants digest <aquatic-plants at actwin_com>
> > 
> > On Wed, 9 Feb 2005 07:11:19 -0800, Vaughn Hopkins 
> > <hoppy1 at surewest_net> wrote:
> > > I don't have one of AH's reflectors, but from their
> website it seems
> > > that they consist of flat surfaces, not a parabolic
> surface.  
> > So, there
> > > is no exact focal point.  I am going to make a
> version of what it
> > > appears to be, using wood and aluminum or stainless
> steel tape 
> > as the
> > > reflective surface (J.C.Whitney has stainless steel
> tape), and 
> > use it
> > > for a set of three parallel T8 bulbs.  I think I can
> increase 
> > the light
> > > output from the two outer bulbs in the set by as much
> as 50% 
> > over what
> > > a single white painted flat surface behind the bulbs
> would give. 
> > This
> > > will be a subjective experiment since I have no means
> of actually
> > > measuring the light.  With any reflector  you can
> just look at the
> > > light and if you see a nearly uniform, but wide area
> of light 
> > you are
> > > successful to some degree.  (Plus, look at all the
> fun you get 
> > by doing
> > > it this way!)
> > 
> > IIRC, the beginning of this thread was someone asking a
> question 
> > as to
> > whether installing these reflectors was a good way to
> raise light
> > levels vs. investing in different bulbs, etc.  I have
> an AHS retrofit
> > kit installed and like it quite a bit.
> > 
> > Their reflectors appear to be flat surface
> approximations of a
> > parabolic surface.  I have no doubt that measuring
> output with your
> > eye, or at a particularly wavelength through a
> detector, will show
> > increased light levels.  What I do doubt is that after
> the light
> > travels through 1 or 2 reflective surfaces (the surface
> of water 
> > in a
> > tank and a glass cover if one is in place) that the
> light intensity
> > will be much greater at a 3" water depth than it would
> be with a
> > cheap, rectangular reflector.  Better?  Probably. 
> Enough better to
> > make a difference in plant growth?  Don't know but I'd
> lean towards
> > not a whole lot.  As much difference in plant growth as
> installing
> > better lights? I really doubt it.
> > 
> > Liz
> > 
> > 
> > ------------------------------
> > 
> > Message: 4
> > Date: Wed, 9 Feb 2005 08:50:04 -0800
> > From: Vaughn Hopkins <hoppy1 at surewest_net>
> > Subject: Re: [APD] AHSUPPLY's Reflectors
> > To: Liz W <satirica at gmail_com>,	aquatic plants digest
> > 	<aquatic-plants at actwin_com>
> > 
> > To be honest about it, I started my project to build a
> light 
> > fixture 
> > with the idea of saving money over buying something
> like the AH 
> > system. 
> >  And, I might possibly do so, but it will be less than
> $10 saved. 
> > Now 
> > it is just a fun project, with the added bonus of
> avoiding the $20 
> > per 
> > bulb cost for CF replacement bulbs.  The percentage  of
> light lost 
> > to 
> > reflection at the water surface, reflection from the
> cover glass, 
> > and 
> > absorption by the water and cover glass will be the
> same for any 
> > light 
> > system, so that doesn't enter into it.  The reflection
> losses at 
> > the 
> > reflector surfaces will be greater than with AH's
> excellent 
> > reflector, 
> > but now I am wondering why not use actual glass mirror
> strips for 
> > the 
> > reflector - that should get closer to the AH
> reflectivity.  So, 
> > for me, 
> > this hobby is about the fun of DIY as well as the fun
> of growing 
> > beautiful plants.  Being retired gives me the time for
> this, and 
> > it 
> > does keep me out of trouble!
> > 
> > On Wednesday, February 9, 2005, at 08:29 AM, Liz W
> wrote:
> > 
> > > On Wed, 9 Feb 2005 07:11:19 -0800, Vaughn Hopkins 
> > > <hoppy1 at surewest_net> wrote:
> > >> I don't have one of AH's reflectors, but from their
> website it 
> > seems>> that they consist of flat surfaces, not a
> parabolic 
> > surface.  So, 
> > >> there
> > >> is no exact focal point.  I am going to make a
> version of what it
> > >> appears to be, using wood and aluminum or stainless
> steel tape 
> > as the
> > >> reflective surface (J.C.Whitney has stainless steel
> tape), and 
> > use it
> > >> for a set of three parallel T8 bulbs.  I think I can
> increase 
> > the 
> > >> light
> > >> output from the two outer bulbs in the set by as
> much as 50% 
> > over what
> > >> a single white painted flat surface behind the bulbs
> would 
> > give.  This
> > >> will be a subjective experiment since I have no
> means of actually
> > >> measuring the light.  With any reflector  you can
> just look at the
> > >> light and if you see a nearly uniform, but wide area
> of light 
> > you are
> > >> successful to some degree.  (Plus, look at all the
> fun you get 
> > by 
> > >> doing
> > >> it this way!)
> > >
> > > IIRC, the beginning of this thread was someone asking
> a question 
> > as to
> > > whether installing these reflectors was a good way to
> raise light
> > > levels vs. investing in different bulbs, etc.  I have
> an AHS 
> > retrofit> kit installed and like it quite a bit.
> > >
> > > Their reflectors appear to be flat surface
> approximations of a
> > > parabolic surface.  I have no doubt that measuring
> output with your
> > > eye, or at a particularly wavelength through a
> detector, will show
> > > increased light levels.  What I do doubt is that
> after the light
> > > travels through 1 or 2 reflective surfaces (the
> surface of water 
> > in a
> > > tank and a glass cover if one is in place) that the
> light intensity
> > > will be much greater at a 3" water depth than it
> would be with a
> > > cheap, rectangular reflector.  Better?  Probably. 
> Enough better to
> > > make a difference in plant growth?  Don't know but
> I'd lean towards
> > > not a whole lot.  As much difference in plant growth
> as installing
> > > better lights? I really doubt it.
> > >
> > > Liz
> > > _______________________________________________
> > > Aquatic-Plants mailing list
> > > Aquatic-Plants at actwin_com
> > > http://www.actwin.com/mailman/listinfo/aquatic-plants
> > >
> > 
> > 
> > 
> > ------------------------------
> > 
> > _______________________________________________
> > Aquatic-Plants mailing list
> > Aquatic-Plants at actwin_com
> > http://www.actwin.com/mailman/listinfo/aquatic-plants
> > 
> > 
> > End of Aquatic-Plants Digest, Vol 18, Issue 16
> > **********************************************
> > 
> 
> _______________________________________________
> Aquatic-Plants mailing list
> Aquatic-Plants at actwin_com
> http://www.actwin.com/mailman/listinfo/aquatic-plants
> 


=====
Christel Kasselmann, 
author of the best current authoritative text on aquatic plants 
will be a featured speaker at 
The Northeast Council of Aquarium Societies 30th Annual Convention.
March 18-20, 2005 at the Marriott Hotel, Farmington, CT
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