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RE: [GSAS-Member] rocks in a 90 gallon
I had some terracotta honeycomb that was about a foot long, and big enough
for a foot long channel catfish at the CWU Biology dept. to hide in. They
loved it. Home Depot might have it.
Susan
-----Original Message-----
From: gsas-member-bounces@thekrib.com
[mailto:gsas-member-bounces@thekrib.com] On Behalf Of matt kaufman
Sent: Wednesday, March 02, 2005 9:22 AM
To: gsas-member@thekrib.com
Subject: Re: [GSAS-Member] rocks in a 90 gallon
It was in NJ where I used to live :-) Don't know about out here - it's from
landscaping suppliers, haven't checked them out yet here.
>From: John Ruhland <john@drruhland.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: Tue, 1 Mar 2005 19:20:09 -0800
>
>Is the clay honeycomb something readily available?
>
>
>On Feb 28, 2005, at 3:43 PM, matt kaufman wrote:
>
>>my $.02
>>
>>Lots of big heavy rocks in tanks with cichlids really really really is a
>>bad idea. They dig, and what's worse, when they reproduce and begin
>>flooding the tank with offspring, it becomes impossible to get the
>>offspring out of the tank without a lot of work moving rocks around. Just
>>not worth it. Sand under rocks is a *bad* idea. Dig dig dig crash crackle
>>splash!
>>
>>I used lava rock, which I had in big, 'softball' sized chunks. It hardly
>>weighs anything, weighs even less when submerged, gets a nice coating of
>>algae on it and is full of good nooks and crannies for bacteria, plus
>>hoisting it out when removing a few hundred julidochromis offspring is
>>much easier than big lake stones or whatever. I got the rocks at a
>>landscape supply house, much cheaper than a pet shop.No substrate except
>>in front of the rocks, where I kept some sand.
>>
>>I also did 'breeding' tanks with PVC for caves, works great though not
>>that attractive. The best breeding setup I saw in a 90 was a 'honeycomb'
>>of clay ceramic hexagonal tubing. My buddy bred malawi cichlids like
>>yours by the handful - males claimed one or two tubes and egg-carrying
>>females would hide out in the tubes. It was cool to watch, you could see
>>the territorial disputes. I think the shape of the honeycomb spread the
>>weight around nicely, too.
>>
>>Matt
>>
>>>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.
>>> > >
>>> > >
>>> > >
>>> > >__________________________________
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>>> > >
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>>> >
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>>>
>>>
>>>
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>>
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>
>
>
>Dr. John F. Ruhland
>The Natural Health Medical Clinic
>4002 - 25th Avenue S, Seattle, WA 98108
>206-723-4891
>www.drruhland.com
>
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