So my tank broke...

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skjl47 said:
Hello; Back in the 1970's I had a homemade 125 gallon tank with an angle iron frame. It also had a tihin metal brace across the top of the tank at the center. The cross brace was held in place by small machine bolts. The tank held up for many years. Eventually enough rust formed betweet the small bolt and the top of the glass at the back. The rust put pressure on the glass and the back panel cracked all the way to the bottom. Lost a tank for not using stainless fasteners.

It occurs to me that there has been a serious amount of cold here in TN in the last week. Could it be that the basement got colder than normal? With tank heaters keeping the water warm there may have been different rates of thermal stress if the ambient air got much colder than normal. A metal frame might have expanded or contracted at a different rate than the glass.

Was a heater near the location of the crack?
Click to expand...

That's another good point I've never thought of...makes sense though.
 
Thanks

The tank is not a metal framed tank, it has been very cold here in Illinois lately but my furnace in my house has been working great...

Here is the setup that i had on the tank, my most recent video, it is the 1st tank in the video
[video=youtube;lPNH5p6ta7w]http://www.youtube.com/watch?v=lPNH5p6ta7w[/video]
 
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My guess is some debris got in between the bottom glass and brace either during move or before and eventually it just popped being tempered glass or the heater detached from the suction cups and it fell and heated up that spot....

Either way that's horrible man! Very sorry. I know the time and effort you put into your tanks and stock!




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heavy driftwood attached to a base, placing weight on a minimized area of glass...perhaps some back & forth shifting from water current.
I'm thinking not the best weight distribution for a glass bottom. maybe better on acrylic.
?
 
Was the homemade hose attachment hanging on the tank at the time?
 
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