Cracked 400g need Help

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Dionysus

Dionysus

Gambusia
MFK Member
May 10, 2007
420
1
16
Wisconsin
Recently bought n received this glass 400g tank from a MFK'r. Was delivered late at nite, so had very little light. Sun comes up, find this crack in bottom of tank, it's all way thru...kno was already cracked b4 received, but of course, the @$$ clown won't answer phone. So I'm stuck with cracked bottom. Kno most pressure exerted on tank sides, but can't fill this w/o knowing it will hold. Haven't had experience fixing larger glass tanks like this.

So uploadfromtaptalk1357611003883.jpgU guys got any ideas, besides replacing full bottom pane, for saving this glass tank?

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Didn't beastfish1 just use this pic in his thread about his two new tanks?

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zimmermanst said:
Didn't beastfish1 just use this pic in his thread about his two new tanks?

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Click to expand...

Did he? Maybe, but we trying to figure a solution out...got a solution?

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I'm thinking best bet is glueing plywood to bottom of tank...I'm not a tank builder by any means, so would like to kno if that's a horrible idea, bad, or any ideas??? I'm a carpenter, n think epoxy n plywood would work for holding bottom together, but tell me if wrong, please!!!

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You can silicone a sheet of glass that covers the entire crackm which will keep the crack from traveling further. You can see demonstrations of this kind of repair on youtube.
 
I have done the above suggestion, siliconing a piece of glass over a cracked area, and it works very well. Make sure the new piece is larger than the crack. Might do both sides because it's for a 300.
 
Replace the bottom. I wouldn't trust a patch. The crack may walk under pressure. 400 gallons of water is a lot to be leaking out everywhere.
 
I would get a full piece for the bottom and silicone it in. Use the same thickness. It might cost a few bucks but what can you do. You bought it knowing it was cracked?
 
I would never use wood due to the water.

Suggestion 1: Buy a new piece of glass and replace it.

Suggestion 2 (Preferred and probably more affordable): Buy 1/8" 416 stainless or grade 50 steel (standard at most yards, but will need 2 part epoxy paint coat) plate. Have a 1/8" thick x 1-2" wide strip of matching steel welded around the edge. Use industrial grade aqaurium silicone to laminate the steel to the bottom of the tank. This should prevent any separation of the bottom, prevent the crack from growing and keep the whole bottom waterproof/capable of containing water).
 
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