From: Trish <snips36@yahoo.com>
Reply-To: Greater Seattle Aquarium Society member
chat<gsas-member@thekrib.com>
To: Greater Seattle Aquarium Society member chat <gsas-member@thekrib.com>
Subject: RE: [GSAS-Member] rocks in a 90 gallon
Date: Mon, 28 Feb 2005 10:06:52 -0800 (PST)
Bob-
I have sand as substrate. And their are Africans in
this tank as well. Iced Blue Zebra{Red tops}7 of them
and also 4 Yellow Labs.
I do know about the styrafoam, but found this way
after this tank was set up...for it was orginally just
a tropical tnak with Goramies, and one time
Angels.....but the last say 3 or 4 years it has been
just Africans, so now adding the foam is not possible.
Well it possible just not wanting to. LoL....
The rocks I am using larger rocks on the bottom, and
then stack up to smaller ones. And also siliconed
together rocks with using a pastic crate as frame, and
made caves, and also a wall so the filter tubes can
not be seen.
And your right the Africans love to dig!
Trish
--- Bob and Judy Holmes <jbholmes@nwlink.com> wrote:
> Trish, what kind of fish will be in the tank? Some
> fish like to move the
> gravel around which can undermine the rocks, causing
> them to shift. Could
> be disastrous. I used a piece of 1/2" styrofoam
> under the substrate & rocks
> in my Tanganyikan cichlid tank to prevent the point
> loading Clay mentioned.
> You'd have to tear the tank down to install it.
> Bob
>
>
> At 11:25 PM 2/27/2005 -0800, you wrote:
> >Sooooooooo, without doing all the math and research
> to see what glass
> >can handle and having put some crazy huge rocks in
> tanks of glass with
> >no visible side effects.....I will give my best
> guess if you like. If
> >you do not "point load" the glass you will be fine
> with whatever rock
> >you place in the tank. Soooooo, what does "point
> load" mean? It means
> >do not place all the weight on one tiny spot on the
> tank floor. If your
> >rock has sand underneath it to help dissipate the
> load across the glass
> >tank floor you will be fine. If you let the rock
> sink through the sand
> >such that all the weight could potentially rest on
> one point on the
> >glass floor you could be in for some issues.
> >I can give you an example of what happens with
> point loads in airplanes.
> >If you get on an airplane in tennis shoes the
> aircraft floor will
> >support the load easily, as it is spread out over
> the entire shoe base,
> >and you will make it to your seat. If you get on
> an airplane in stileto
> >heels and try to accomplish the same thing, you
> will find the heels
> >punching holes in the floor and it will be very
> difficult to make it to
> >your seat.
> >Sooooo, it is all about the number of pounds per
> square inch you are
> >placing on your floor, be it glass or foam core
> aluminum panels. I am
> >sure if you wish to do a little surfing online you
> can find the pounds
> >per square inch your glass is designed to handle.
> Doing some quick
> >estimates of your tank size....and I could be off a
> bit. If I assume
> >your tank dimensions to be about 2'x4' on the base
> and assuming the
> >weight of water and rock to be about 10 lbs/gallon
> of tank space. You
> >come to 900 lbs/1152 square inches or .781
> lbs/square inch. Doing a
> >little surfing myself, here are some average glass
> strength values
> >Annealed Glass 6,000 psi, Tempered Glass 24,000
> psi. These values are
> >based on a Typical Breaking Stress (large light 60
> sec. load). This is
> >all fine and good, but, your load from rocks will
> not be a typical 60
> >sec. load. Even so, you can see glass can take a
> heck of a load
> >compared to what you are currently putting on your
> tank.
> >Soooo, all that said, be careful. If you are truly
> working with
> >tempered glass you need to make sure you do not
> scratch it near where
> >your higher loads are placed on the bottom. Simple
> scratches in
> >tempered glass can be a invitation to disaster as
> the glass will shatter
> >easily once the surface has been damaged. This is
> why you cannot cut
> >tempered glass by etching it and snapping it.
> >Wanna learn more about glass than you could ever
> imagine.....check this
>
>out.....http://www.glassonweb.com/glassmanual/topics/index/tempered.htm
> >
> >Now, your house floors.....there is another load
> issue.....but, that is
> >another discussion. One quick suggestion here
> though....do not build
> >your aquarium stands on stiletto heels.
> >
> >Clay
> >
> >
> >
> >
> >
> >
> >
> >
> >-----Original Message-----
> >From: Susan Welenofsky
> [mailto:welenofsky@comcast.net]
> >Sent: Sunday, February 27, 2005 5:21 PM
> >To: 'Greater Seattle Aquarium Society member chat'
> >Subject: RE: [GSAS-Member] rocks in a 90 gallon
> >
> >
> >The bottom is probably tempered glass, so it will
> be extra strong. I
> >would contact All Glass and ask them to be sure. I
> would like to see a
> >picture of your wall and tank!
> >
> >Susan
> >
> >-----Original Message-----
> >From: gsas-member-bounces@thekrib.com
> >[mailto:gsas-member-bounces@thekrib.com] On Behalf
> Of Trish
> >Sent: Sunday, February 27, 2005 5:15 PM
> >To: Fish List
> >Subject: [GSAS-Member] rocks in a 90 gallon
> >
> >I need a question answered. And hoping someone here
> >can help me.
> >
> >I need to know how much rock can a 90 gallon hold.
> It
> >is an All Glass Aquarium, is on a wood stand, with
> >only the plastic bar which comes across the middle
> on
> >the bottom. I have no plywood underneath. Tank is
> >filled and has been running now for 5 years, so
> >putting one underneath is not an option.
> >
> >Thanks in advance!
> >
> >Trish
> >
> >BY the way my rock wall is finished and is going in
> >this tank, but have exsiting rock in here
> >already.....so need to know how much wieght it can
> >support. I let it cure now for 4 days.
> Outside....so
> >no oder left.
> >
> >
> >
> >__________________________________
> >Do you Yahoo!?
> >Yahoo! Mail - Easier than ever with enhanced
> search. Learn more.
> >http://info.mail.yahoo.com/mail_250
> >_______________________________________________
> >GSAS-Member mailing list
> >GSAS-Member@thekrib.com
>
>http://lists.thekrib.com/mailman/listinfo/gsas-member
> >
> >_______________________________________________
> >GSAS-Member mailing list
> >GSAS-Member@thekrib.com
>
>http://lists.thekrib.com/mailman/listinfo/gsas-member
> >
> >_______________________________________________
> >GSAS-Member mailing list
> >GSAS-Member@thekrib.com
>
>http://lists.thekrib.com/mailman/listinfo/gsas-member
>
>
> _______________________________________________
> GSAS-Member mailing list
> GSAS-Member@thekrib.com
>
http://lists.thekrib.com/mailman/listinfo/gsas-member
>
__________________________________
Do you Yahoo!?
Yahoo! Mail - Easier than ever with enhanced search. Learn more.
http://info.mail.yahoo.com/mail_250
_______________________________________________
GSAS-Member mailing list
GSAS-Member@thekrib.com
http://lists.thekrib.com/mailman/listinfo/gsas-member