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Old 04-14-2011, 03:28 PM   #1
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Gap between aquarium glass

Just did a water change on my 75 gallon tank. The front (long) edge of the tank and the left side glass are not resting against each other. The silicone seal on the inside is obviously touching both pieces as there is no leak, but it's quite a gap on the outside and I'm just wondering what I should do? Should I plug the gap with new silicone, should I completely reseal that side? At the bottom the gap is already filled with silicone, but it lessens in the middle and I can stick the end of my finger in there (it's about 4mm/0.15 inches apart), but the top then it is filled. I don't actually know if this is new, or whether it's always been like this... I actually assume it's always been like this.

Just to be clear, the glass is the same distance apart the whole way up, it's just there's no silicone between the glass (on the outside edge, at least) in the middle.

If I don't decide to repair completely, would it do any harm to plug the gap with new silicone? ie: would the acetone from the new affect the old?
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Old 04-14-2011, 03:34 PM   #2
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Can you post a picture? I'm still not clear what you are referring to.
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Old 04-14-2011, 03:42 PM   #3
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I really don't think a photo will show you anything as it isn't uniform the whole way up. I can try to do a video where I show the differences?

Basically the front and side are separated, the silicone on the inside of the tank is obviously sealing the tank, but on the outside of the tank, middle way up, there is no silicone on the outside between the glasses. Is that clearer?
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Old 04-17-2011, 11:01 AM   #4
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This would concern me, but, if it was working I don't know whether I would attempt a repair. The only way to fix something like that properly is to totally disassemble the tank. If there is no movement in the glass, which is a dead giveaway that there is an impending problem, I would probably leave it. However, all my tanks are in the basement around the floor drain so a leak would not have the same impact it would if the tank were in a living area.
Filling the void from the outside won't do any harm, but if it isn't clean, adhesion may not be all that good. You could actually run a clean bead from top to bottom if it made you feel better.
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Old 04-17-2011, 11:52 AM   #5
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I would not trust the tank. Over time I think the tank may fail.
How old is the tank and where did you get it from. It appears to be a manufacturing defect and I would get in touch with the manufacturer.
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Old 04-20-2011, 11:52 PM   #6
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Quote:
Originally Posted by cmor1701d
I would not trust the tank. Over time I think the tank may fail.
How old is the tank and where did you get it from. It appears to be a manufacturing defect and I would get in touch with the manufacturer.
I have to agree. IMO it would be on the back of my mind as would a stand I don't completely trust.
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Old 04-21-2011, 05:29 AM   #7
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I would take it down either return it or sell it.
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Old 04-21-2011, 11:41 AM   #8
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Thanks guys. I think I'll try to reseal it, but emptying is going to be such a pain...

Anyway, was bought new from Petland. It's a DeepBlue 75 gallon.
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Old 04-21-2011, 01:44 PM   #9
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Resealing it won't fix the problem, if there is one.
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Old 04-21-2011, 01:54 PM   #10
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I agree. You would need to take it apart (remove the glass) and put it back together to reseal it properly. As a store bought product I would make the manufacturer and store fix the problem.
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