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Old 02-08-2006, 01:01 PM   #11 (permalink)
 
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Thanks for the info Kilroy. I will poke around the online resources some more.
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Old 02-08-2006, 02:44 PM   #12 (permalink)
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from what a friend told me regarding custom building your own tank, once you go over 19" in height, you will need bracing at the top. because the tank will be prone to bowing due to increased water pressure.

and i'm not sure if you would need to have just the bottom of the tank as tempered. of course going tempered all around does increase the price of the tank, and if you go with regular glass all around, the thickness is increased.

i myself am going to building a custom 50 gallon tank, but will be using regular glass, which will only have to be 1/4" thick. as for concerns about the tank bottom, i would ensure that you have a piece of foam insulation (1" thk) separating the glass tank and the plywood top of the stand.

is the $914.17 just for the one piece of 3/4" glass? that seems really expensive. i had gotten an estimate from a local glass place for my tank (36x19x19 - 1/4" thk), and they quoted me ~$150.00, which included a discount (~$180.00 before any discount). and that's in canadian dollars. in the end, the cost was cheaper than a store bought tank by about $20 dollars.

there has to be some local glass shops in your area that can cut glass for you for a better price. and kilroy's suggestion of GlassCages.com is not bad for prices in the size you're looking at.

anyways... good luck with your search and keep us updated
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Old 02-08-2006, 09:28 PM   #13 (permalink)
 
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Quote:
Originally Posted by freydo
from what a friend told me regarding custom building your own tank, once you go over 19" in height, you will need bracing at the top. because the tank will be prone to bowing due to increased water pressure.

and i'm not sure if you would need to have just the bottom of the tank as tempered. of course going tempered all around does increase the price of the tank, and if you go with regular glass all around, the thickness is increased.

i myself am going to building a custom 50 gallon tank, but will be using regular glass, which will only have to be 1/4" thick. as for concerns about the tank bottom, i would ensure that you have a piece of foam insulation (1" thk) separating the glass tank and the plywood top of the stand.

is the $914.17 just for the one piece of 3/4" glass? ....
Yes the estimate was for 1/2 inch thick tempered glass panes all around; the only variable number in the equation would be the bottom piece. I was wondering if I could substitute a 3/4 inch thick regular glass with a 1/2 inch thick tempered glass to cut the cost down from 9 to 5 bills. I don't know for a fact which is stronger to withstand the weight pressure. I also don't know for sure if the 1/2 inch tempered glass is strong enough to retain its flatness when loaded with water. Not sure if these questions will be answered here. Would you mind asking your friend, when convenient, to elaborate some more about this bowing factor, maybe specifically with my dimensions in mind (5' x 3' x 2, 0.5" tempered all around')? That would be great to know.

There are local glass shops indeed. They probably can provide me some pointers I seek or overlooked; it's just that I haven't got time to step in one to ask away. But for something like this I wouldn't even mind driving cross a stateline for a pick-up if the price justifies. And yes indeed on the foam padding, another good call.

Thanks for giving it much thoughts freydo.

Ricky
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Old 02-09-2006, 07:53 AM   #14 (permalink)
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my friend had only mentioned the water pressure issue for regular glass, and he was a little fuzzy on his recollection. he just knew that he read/heard it somewhere that anything over 19" brought in additional issues to deal with, mainly water pressure against the glass walls. i'm sure tempered glass would be a lot stronger in resisting increased water pressure. so regardless of the type of glass you will be going with, bracing would be a good idea.

i'm sure others here have more clearer knowledge on this.

now that you mention that it could be tempered glass all around, then the ~$900 for the tank is appropriate.

i found this site on constructing your own glass tank, if you will be the one doing it. lots of good information on things to have on hand and such:

http://www.aquarticles.com/articles/..._Aquarium.html

honestly, the way i got my price quote was going through the yellow pages, and looked up the glass shops that had an email. i asked them what the glass cost and their suggestion for glass thickness would be for my tank. a whole lot easier than driving out to the four corners of the city.

i'm sorry if i wasn't able to answer all your questions, or creating more questions, i'm kind of going through the same thing as you. or will be in a few months. but if you do have more questions, i'll more than be glad to help out if i can.

blind leading the blind sort of thing
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Old 02-13-2006, 05:10 PM   #15 (permalink)
 
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http://www.garf.org has a ton of information about building your own tanks. The site is a little hard to navigate, But it's well worth your time. This link will take you to the tank build page.

http://www.garf.org/tank/buildtank.asp

It will give you the cut list and some basic instructions to build your own tank.
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Old 03-16-2006, 10:59 AM   #16 (permalink)
 
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http://saltaquarium.about.com/cs/aqu...customtank.htm If I did this correctly this should link you to a table to help you calculate the thickness of the glass for your diy tank. I seem to remember seeing somewhere in my research for diy tanks that you do not need to use tempered glass because when tempered glass fails it will shatter into a million little pieces instead of just cracking, but I could be mistaken. Good luck on the build, I've been toying with the idea of a plywood aquarium like the one in the garf link in the previous post.
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Old 03-16-2006, 01:46 PM   #17 (permalink)
 
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found some links about tempered glass. The first is from a glass manufacturer and the second one is from the krib. http://www.factoryglassdirect.com/faq.cfm
http://www.thekrib.com/TankHardware/glass.html#7 Good luck on the build and it would be great to see some pics of the process when you start.
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Old 03-16-2006, 05:27 PM   #18 (permalink)
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Just a word of warning. I've been looking into a large custom aquarium lately, about the same size as you're looking at. I haven't found any place that will do it without at least a stainless steel frame around the top and bottom. Most of the smaller shops use a glass reinforcement around the top with openings similar in size & location to an acrylic tank.

There is a VERY good reason that they do this. Just becasue it doens't leak the first 2 years doesn't mean it never will. A catastrophic failure in something this big canl wipe out an entire level of your house. I have absolutely nothing against a DIY tank, but make sure you do your homework before you start.

Tempered glass is vastly stronger than regular when it comes to resisting bending forces which are maximal at the mid-point of the pane. This allows much thinner and lighter glass. It does have a peculiar method of failure if it ever does fail though. On rare occasions a small point load (dropped rock, maybe) can lead to an impressive explosion resulting in a zillion little pieces. Anyone who has tried to drill a tempered bottom knows what this looks like. Regular glass would either simply crack, or might just get pitted or scored by a similar event.
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Old 03-22-2006, 05:11 AM   #19 (permalink)
 
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Here are a couple of links with very detailed instructions on building a frameless tank. It's not as big as the one you are planning, but it should give you some good ideas, I know it did for me. I'm picking up glass today for a small test tank build using this information as a guide.

http://www.plantedtank.net/forums/di...lass-tank.html

http://www.plantedtank.net/forums/di...k-warning.html

Good luck with your tank, and I hope you find some of this information helpful.
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