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Old 08-30-2005, 01:26 PM   #11
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Originally Posted by bigsky
oh yeah, that gap on the commercial tanks is there to replace the foam sheet.
The foam sheet? does that mean everyone is suppose to put a piece of foam under there tanks? I know I never have(nor has most).. and the gap under all of my tanks has been all the way to all edges under the tank..

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Old 08-30-2005, 02:57 PM   #12
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Most all glass aquariums have at least a 1/4" gap underneath for flex. The trim that is around all of them is practically that "trim". the silicone sealant used in aquarium making is quite strong when fully cured and can withstand considerable weight. This has been widely proven in the UK where most of their tanks have no trim at all... If you research this, I believe you will find this to be true also...

In the aquariums I have setup in the past, there has been no foam used and the bottoms were suspended.. no problems there...

Back to the question posed at the beginning, For safety, I would not go more than 48" long and 20" high for 1/4" glass. I looked at some new tanks to replace my 55 gal and all larger tanks than that were 3/8".
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Old 08-30-2005, 11:56 PM   #13
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here are two references for padding under your tank. they do not specify a manufactured tank of custom built tank.
Nobody wants a broken fishtank, capish?
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Old 08-31-2005, 09:14 AM   #14
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Thank you for taking the time to show the articles... cool. I still don't do it, because the one thing pointed out, I use a commercially or professionally built stand. I agree with you that it is useful, I just stated I don't use it.
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Old 09-07-2005, 12:20 AM   #15
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New Strategty

Since I started this thread I thought I would post an update as to what I have done.

I pulled the glass out of storage and found the stamp in the corner that says it has been tempered. Bummer

I called around to a few glass shops I deal with and priced glass for building several different sizes of aquariums. What I really wanted was a 90 gallon about 24" deep. Best price on glass $301 Had an offer for 1/4" salvage glass all I want for $60. Much better but I didn't buy it.

I must say that I really enjoy building things myself, sometimes more than the rest of the particular hobby. After browsing a fairly close by LFS with my Girlfriend on Saturday I found a deal. They had a 80 gallon Bowfront all glass aquarium and I fell in love. The bowfront is Awesome! I made a deal $200 for the aquarium, $70 for a Seaclone protein skimmer, a Magdrive 9.5 for $65. All I had to do is promise to buy more from them. No problem, out of the four LFS I have visited this was the only one worth dealing with. Besides the guy that helped us gave us ten gallons of water out of their ro/di system for our turtle tank including the two jugs!

SO Monday I moved the tank to a roller cart in my shop (I own a custom cabinet and millwork business) and the stand and canopy construction begins! I'll post pics when I'm done. It's going to be cool! I'm going to place the tank in my bedroom on a wall at the foot of my bed. All my furniture in the bedroom is black or bamboo. The stand and canopy will be Black with some bamboo panels and I might through some Jatoba in there somewhere since I have alot of it laying around right now ( I am building a curved staircase out of it right now).

My next step will be a few more questions coming in new threads. Thanks for all the help, this place rocks!
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Old 09-15-2005, 12:15 PM   #16
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Well this might help answer all the questions or just raise more.

I watched a tank built from sctratch that is 350 gallons. It is 24 inches high, 60 inches wide and 60 inches deep. The glass is 1/2" plate. The tank was made by raising the glass 3/4 inch of the bottom with a wooden frame around the entire tank. All the wood was sealed and primed before adding it to prevent warping. The bottom is supported by the thick excercise matting in one piece under the entire thing. It has been running for over 7 years and never failed or leaked.

I absolutely agree that the glass should have a pad under it and when I build my DIY tank it will have one. I also agree that the glass needs to be on the inside of walls unless you are protecting it better than the standard DIY tank. You commercial tank maker doesn't care about how long it last as long as it makes it out the store door and through any warrenty period. Take the extra steps to support your tank is it wider than the standard tank.

19" is the highest I would go for a DIY tank unless you are a real pro. This just gives you the leway for minor deviations in your assembly that oyu don't see in commercial tanks. If you are going more than 15 inches wide, put somehting under the tank that is not only strong but flexes enough to move with the tank bottom. There needs to be a much better book written on the needs for special tanks as far as glass and support. There isn't enough information out there to help anyone build a tank outside of the normal dimensions.
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Old 09-15-2005, 01:57 PM   #17
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one of these days soon I'll post the math and building of my tank and stand so others can figure out the stresses for them selves.
Give me a couple of weeks to get it done. I'll post it as a new topic, but will let you all know when it is up right here.

Nobody wants a broken fishtank, capish?
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