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Bmtiz92 11-30-2012 05:21 PM

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.

Lt. 11-30-2012 05:32 PM

Return it or exchange it, it isn't worth the risk IMHO

Bmtiz92 12-02-2012 01:35 AM

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.

chbix 12-02-2012 01:44 AM

Actually the silicon typically bonds better to acrylic as it melts it

tonedogz 12-03-2012 01:13 AM

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.

tonedogz 12-03-2012 01:18 AM

By the way silicone does not stick very well to acrylic so its almost a given it would leak.

chbix 12-03-2012 02:00 PM

I'm sorry I meant weld-on no silicone

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