leaking 120 gallon - The Planted Tank Forum
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post #1 of 5 (permalink) Old 03-24-2006, 04:32 PM Thread Starter
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leaking 120 gallon

Hello, I have a 120 gallon tank that is leaking out of the front left bottom corner. I moved the tank by myself, I guess it twisted and broke the seal in the corner

Do I have to re-silicone the whole tank by scraping all of the old silicone off the bottom and sides of the tank to fix it? Or can I silicone over the old silicone by overlapping it?

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post #2 of 5 (permalink) Old 04-01-2006, 03:24 AM
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No never slap silicon on top of silicon as it will not stick. Just to be safe if i were you, you should do inside and out and have that piece of mind. Here's something that will help you along your way. I added many pics too:


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post #3 of 5 (permalink) Old 04-10-2006, 01:38 AM
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If it was my tank I would empty it and separate the front piece,clean it out and glue it back on.I know it is not a simple job but believe me, I speak from personal experience when I say it is not as hard as you think.either that or buy another tank ,if you have the time it is worth it to repair it.
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post #4 of 5 (permalink) Old 04-10-2006, 03:59 AM
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I would look carefully to see how much of the seal in the corner is detached. If it is a small area I would carefully cut off all of the filet of silicone from the inside of the corner, clean the glass as well as I could, even using a solvent like acetone to do a better job. Then I would apply a new filet of silicone along the whole corner.
The used 120 gallon tank I bought several years ago was "repaired" that way, and it never did leak in the 4-5 years I used it. The corners looked pretty bad, but I just made corner molding to cover them, from the same wood as my stand and canopy, and lightly cemented them over the corners with dabs of silicone.
Trying to remove and reglue such a heavy piece of glass on that big a tank would always be a distant last choice if I were doing it.

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post #5 of 5 (permalink) Old 04-10-2006, 06:02 AM
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couple questions,
can you tell which seam is leaking? is it the vertical joint where the front meets the end, or one of the horizontal joints where the front or end meets the base?
does the tank have any trim (aluminium or plastic angle) on the corners, or is it bare?
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