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Re: [APD] plexi lid vs glass?

To: aquatic plants digest <aquatic-plants at actwin_com>
Subject: Re: [APD] plexi lid vs glass?
From: "S. Hieber" <shieber at yahoo_com>
Date: Wed, 21 Sep 2005 04:58:36 -0700 (PDT)
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One thing to keep in mind, polycarb can't be scored and
cracked to make cuts the way glass and regular acrylic can.
It must be sawn. Most versions absorb less water and are
less conductive of electricity than "regular" acrylic.

Okay, two things. Second, check that water plastic sheets
you by don't have labels stating which side to face towards
the sun for window use. That kind is likely to color from
the UV light from fluorescents.

sh

--- Terry Barber <terbarb at alltel_net> wrote:

> polycarbonate is much better than acrylic for light
> transmission....I think
> you can get that at the Depot too.
> 
> Terry
> 
> > Hi, you guys have been discussing how much light is
> lost through glass.
> That is good to know. Anyone know if more or less is lost
> through a 0.25
> inch piece of plexi from Home Depot? I friend of mine
> added this to his tank
> and I was considering doing
> > it also. I have so much evaporation with an open top.
> > Thanks,
> > Kelleen Harris
> >
> > aquatic-plants at actwin_com on Tuesday, September 20,
> 2005 at 9:00 AM
> wrote:
> >
> >
> > >Send Aquatic-Plants mailing list submissions to
> > > aquatic-plants at actwin_com
> > >
> > >To subscribe or unsubscribe via the World Wide Web,
> visit
> > > http://www.actwin.com/mailman/listinfo/aquatic-plants
> > >or, via email, send a message with subject or body
> 'help' to
> > > aquatic-plants-request at actwin_com
> > >
> > >You can reach the person managing the list at
> > > aquatic-plants-owner at actwin_com
> > >
> > >When replying, please edit your Subject line so it is
> more specific
> > >than "Re: Contents of Aquatic-Plants digest..."
> > >
> > >
> > >Today's Topics:
> > >
> > >   1. Rubins (Richard J. Sexton)
> > >   2. Light and Lids (Rachel Sandage)
> > >   3. Re: putters and gruntlements (RMGTBTS at aol_com)
> > >   4. Re: Light and Lids (Mariano F. Bonfante)
> > >   5. Re: Light and Lids (Jerry Baker)
> > >   6. Re: Aquatic-Plants Digest, Vol 25, Issue 57
> (Jerry Baker)
> > >   7. Re: Alternatives to watt/gallon rule (Andrew
> McLeod)
> > >
> > >
> >
>
>----------------------------------------------------------------------
> > >
> > >Message: 1
> > >Date: Tue, 20 Sep 2005 09:02:03 -0400 (EDT)
> > >From: "Richard J. Sexton" <richard at aquaria_net>
> > >Subject: [APD] Rubins
> > >To: aquatic-plants at actwin_com
> > >
> > >
> > >>Have you tried Rubins?
> > >
> > >Yeah but they made me itch. I'm going back to briefs.
> > >
> > >
> > >
> > >--
> > >
> > > /"\                         /
> http://lists.aquaria.net
> > > \ /  ASCII RIBBON CAMPAIGN / Killies, Crypts,
> Aponogetons
> > >  X   AGAINST HTML MAIL    / http://new.killi.net
> > > / \  AND POSTINGS        / http://images.aquaria.net
> > >
> > >
> > >
> > >------------------------------
> > >
> > >Message: 2
> > >Date: Tue, 20 Sep 2005 06:19:15 -0700
> > >From: Rachel Sandage <rachelsor at gmail_com>
> > >Subject: [APD] Light and Lids
> > >To: aquatic plants digest <aquatic-plants at actwin_com>
> > >
> > >One question I have is if all these light measurements
> and stuff take
> into
> > >account any glass or acrylic cover which might be on
> the tank? Standard
> tank
> > >cover glass is probably pretty bad at transmitting
> light - no extra-low
> > >dispersion glass, no anti-reflective coating, standard
> green soda glass.
> Has
> > >anybody ever done studies to show how much light is
> lost in the lid?
> > > My husband enjoys these discussions mightily, since
> he is an active
> amatuer
> > >astronomer, which is all about light gathering
> capabilities. They spend
> some
> > >time on their lists discussing how best to get light
> from place (star) to
> > >place (eye) too.
> > > Rachel
> > >
> > >
> > >------------------------------
> > >
> > >Message: 3
> > >Date: Tue, 20 Sep 2005 10:00:00 EDT
> > >From: RMGTBTS at aol_com
> > >Subject: Re: [APD] putters and gruntlements
> > >To: aquatic-plants at actwin_com
> > >
> > >scott
> > >
> > >i would write a response but i can't see the screen
> because of the tears
> in
> > >my eyes from laughing so hard.
> > >
> > >tks you made my day
> > >
> > >rich green
> > >milton ma
> > >
> > >
> > >------------------------------
> > >
> > >Message: 4
> > >Date: Tue, 20 Sep 2005 14:18:57 +0000
> > >From: "Mariano F. Bonfante"
> <mariano_bonfante at hotmail_com>
> > >Subject: Re: [APD] Light and Lids
> > >To: aquatic-plants at actwin_com
> > >
> > >With a luxometer I messured 11% loss. The same value
> was obtenied with 3
> mm
> > >to 6 mm glass.
> > >
> > >Mariano
> > >
> > >
> > >
> > >>From: Rachel Sandage <rachelsor at gmail_com>
> > >>Reply-To: rachelsor at gmail_com,        aquatic plants
> digest
> > >><aquatic-plants at actwin_com>
> > >>To: aquatic plants digest <aquatic-plants at actwin_com>
> > >>Subject: [APD] Light and Lids
> > >>Date: Tue, 20 Sep 2005 06:19:15 -0700
> > >>
> > >>One question I have is if all these light
> measurements and stuff take
> into
> > >>account any glass or acrylic cover which might be on
> the tank? Standard
> > >>tank
> > >>cover glass is probably pretty bad at transmitting
> light - no extra-low
> > >>dispersion glass, no anti-reflective coating,
> standard green soda glass.
> > >>Has
> > >>anybody ever done studies to show how much light is
> lost in the lid?
> > >>  My husband enjoys these discussions mightily, since
> he is an active
> > >>amatuer
> > >>astronomer, which is all about light gathering
> capabilities. They spend
> > >>some
> > >>time on their lists discussing how best to get light
> from place (star)
> to
> > >>place (eye) too.
> > >>  Rachel
> > >>_______________________________________________
> > >>Aquatic-Plants mailing list
> > >>Aquatic-Plants at actwin_com
> > >>http://www.actwin.com/mailman/listinfo/aquatic-plants
> > >
> > >
> > >
> > >
> > >------------------------------
> > >
> > >Message: 5
> > >Date: Tue, 20 Sep 2005 08:08:43 -0700
> > >From: Jerry Baker <jerry at bakerweb_biz>
> > >Subject: Re: [APD] Light and Lids
> > >To: aquatic plants digest <aquatic-plants at actwin_com>
> > >
> > >Mariano F. Bonfante wrote:
> > >> With a luxometer I messured 11% loss. The same value
> was obtenied with
> 3 mm
> > >> to 6 mm glass.
> > >
> > >I do believe that nearly all of the loss with glass
> occurs due to
> > >reflection at the physical boundaries (i.e., the
> interface between air
> > >and glass). No matter how thick the glass is within a
> normal range found
> > >on an aquarium, the loss will be the same. I always
> understood that
> > >about 7% was lost at each surface with normal uncoated
> glass. Seems like
> > >if that was the case, a lid would be predicted to lose
> about 13.5%, but
> > >that's not far out from what you measured.
> > >
> > >-- 
> > >Jerry Baker
> > >
> > >
> > >------------------------------
> > >
> > >Message: 6
> > >Date: Tue, 20 Sep 2005 08:11:38 -0700
> > >From: Jerry Baker <jerry at bakerweb_biz>
> > >Subject: Re: [APD] Aquatic-Plants Digest, Vol 25,
> Issue 57
> > >To: aquatic plants digest <aquatic-plants at actwin_com>
> > >
> > >S. Hieber wrote:
> > >> Of course, it's more a matter of personal preference
> than
> > >> "proper" amount. In fact, I know a few folks that do
> about
> > >> 1.0-3.2 putters per gallon per week and love every
> minute
> > >> of it. Their gruntlement has reportedly reached as
> high as
> > >> 10-12 grunts-of-pleasure per day, which equates to
> > >> 34.4-41.28 smiles per week -- of course that's
> C-scale
> > >> weighted for solitary activity. On the A-scale,
> weighted
> > >> for group activity, the numbers would be even
> higher.
> > >
> > >Dude! You forgot the introverted-extroverted exponent
> on the A scale,
> > >which would make the numbers lower for group activity
> :?
> > >
> > >-- 
> > >Jerry Baker
> > >
> > >
> > >
> > >
> > >------------------------------
> > >
> > >Message: 7
> > >Date: Tue, 20 Sep 2005 16:37:19 +0100
> > >From: "Andrew McLeod"
> <thefish at theabyssalplain_freeserve.co.uk>
> > >Subject: Re: [APD] Alternatives to watt/gallon rule
> > >To: "aquatic plants digest"
> <aquatic-plants at actwin_com>
> > >
> > >On Mon, 19 Sep 2005 22:43:28 +0100, Jerry Baker
> <jerry at bakerweb_biz>
> wrote:
> > >
> > >> I have often wondered about applying an infrared
> blocking film to a
> > >> shield in extreme cases of MH lighting heating up a
> tank.
> > >
> > >Probably a really, really bad idea BTW...
> > >Firstly, the 'heat' that seems to come from a bulb may
> not just be
> infrared radiation - all radiation (including visible
> light) will warm
> things up if they absorb it (i.e. they are not
> white/reflective).
> > >Secondly, if MH's do put out a fair amount of
> infrared, then an infrared
> filter will have to absorb all of that radiation - as
> heat. So if it's
> enough to warm up your tank, think what it will do to a
> little bit of
> film...
> > >
> > >-- 
> > >Andrew McLeod
> > >thefish at theabyssalplain_freeserve.co.uk
> > >
> > >This email was scanned carefully before transmission
> to remove any
> content, information or relevance.
> > >
> > >
> > >------------------------------
> > >
> > >_______________________________________________
> > >Aquatic-Plants mailing list
> > >Aquatic-Plants at actwin_com
> > >http://www.actwin.com/mailman/listinfo/aquatic-plants
> > >
> > >
> > >End of Aquatic-Plants Digest, Vol 25, Issue 61
> > >**********************************************
> >
> >
> > Kelleen
> >
> > Central Coast Watershed Studies
> > Phone: (831) 582-5217
> >
> >
> >
> > _______________________________________________
> > Aquatic-Plants mailing list
> > Aquatic-Plants at actwin_com
> > http://www.actwin.com/mailman/listinfo/aquatic-plants
> >
> >
> > -- 
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> >
> >
> 
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References:
- Re: [APD] plexi lid vs glass?
  - From: Terry Barber

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