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Old 11-30-2012, 05:21 PM   #1
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Aquarium silicone

I bought a 5 gallon, still new in the box never been opened for really cheap, but got it home and realized there's a small crack in the bottom of the tank. It's probably about 3 inches long, it doesn't go through to the other side. Can I use aquarium silicone to shut it and keep it from busting open or is it too big of a risk? I know you can use it on glass but I'm not sure about plastic. I have it sitting full of water outside right now and so far it's not leaking.
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Old 11-30-2012, 05:32 PM   #2
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Return it or exchange it, it isn't worth the risk IMHO
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Old 12-02-2012, 01:35 AM   #3
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Apparently it's actually acrylic, does that make a difference? I can't exchange it, and it's a bit of a drive to return it, so if it CAN be safely fixed I'd like to.
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Old 12-02-2012, 01:44 AM   #4
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Actually the silicon typically bonds better to acrylic as it melts it
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Old 12-03-2012, 01:13 AM   #5
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Since its acrylic and the crack is on the bottom you could get a tube of weld-on #16 acrylic cement and glue a piece of acrylic over the crack. I've never heard of silicone melting acrylic but for sure the weld-on will it will fuse one piece to the other and on the bottom no one will see it. You could even weld a piece on both sides for added protection.
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Old 12-03-2012, 01:18 AM   #6
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By the way silicone does not stick very well to acrylic so its almost a given it would leak.
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Old 12-03-2012, 02:00 PM   #7
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I'm sorry I meant weld-on no silicone
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