How bad is this crack

[popper]

The crack is about 5/8" long. You can see its cracked inside. No longer a chip.

 

[BAYMAC]

that's going to travel unless defeated

 

[Kensington Reefer]

As the G-man indicated, it wont get better

i recommend replacement with new tank with full warranty

 

[MolaMola]

That is a chilling thread title. I was fearing a full mature tank photo

 

[Coral reefer]

I’ll have to try it first to let you know

 

[Kensington Reefer]

How big is the tank?

 

[sfsuphysics]

Is this the same glass that you attempted to rebuild?

 

[NanoCrazed]

That glass is toast. Looks like crack is through the cross-section. It'll travel unless you drill a hole at the tip and seal.

The hole relieves stress at the tip. But if it's tempered glass then you probably know it's a no-go

 

[popper]

Is this the same glass that you attempted to rebuild?

Yeah

 

[iani]

That glass is toast. Looks like crack is through the cross-section. It'll travel unless you drill a hole at the tip and seal.

The hole relieves stress at the tip. But if it's tempered glass then you probably know it's a no-go

Its not tempered, if it were it would be in pieces.

 

[NanoCrazed]

Its not tempered, if it were it would be in pieces.

True dat.

 

[Kensington Reefer]

The failure of a tank...
All at once on the floor
Is a very big mess, more than you anticipate
These events tend to occur at the most inconvenient times
Like 3AM....
Just a thought

 

[H2OPlayar]

A Reefing Haiku
by Kensington Reefer

The failure of a
Tank. All at once on the floor.
A very big mess.

 

[Kensington Reefer]

I have suffered such an event
I do not wish it upon anyone
Fortunately in my instance there were no inhabitants
150 gallons...all at once...2am

 

[rygh]

+1 on glass being toast.

But I find that crack rather odd.
If it was tempered, it would have detonated.
But non-tempered, with no load or pressure, really should not propagate like that. A chip should remain a chip.
Seems like it was not annealed properly.

 

[dochou]

Looks like the chipped area got bumped again then turned into a crack.
Unfortunately, I wouldn't use the pane of glass any more.
Dang I was looking forward to the build.
You can still put it together as an experiment and if all else goes well, you can fill it to see how long it can hold water without an explosion.
Fill it outdoors of course.

 

[NanoCrazed]

+1 on glass being toast.

But I find that crack rather odd.
If it was tempered, it would have detonated.
But non-tempered, with no load or pressure, really should not propagate like that. A chip should remain a chip.
Seems like it was not annealed properly.

Actually, it all depends.. if the chip is light enough on the surface then it won't travel. But if the chip creates a stress point, then that stress will translate into a point pressure that will drive it forward -- hence the (theoretical) way to resolve the stress would be to drill at the point of the crack. This is independent of annealing....same as when you get a windshield crack. Starts as a chip but under the right conditions, you get a full on crack. (speaking as a former Materials Science engineer....)

 

[MolaMola]

A Reefing Haiku
by Kensington Reefer

The failure of a
Tank. All at once on the floor.
A very big mess.

Heh heh. That’s a haunting haiku. Will share with students when they study poetry in the spring. Also a great idea for a backup activity when I need it - marine haiku with artwork. Sorry about the actual event @Kensington Reefer