Having trouble with your 120G Options

[beaker]

Hi All
I have a 120G tank which I bought new about five years ago. After about the second year it sprung a leak which I fixed. Then about a year later another leak. In all my tanks has leaked around the bottoms seals four times in five years. Has anyone else had this problem. could it be the depth of the tank? I kept 55G tanks for years without a single leak. Any input would be appreciated.
Tanks.

[neutrinoman]

I've never had any tank leaks, including larger, deeper, older tanks. Search me why not, scares me a little to hear some of the stories of tanks blowing up, etc. Could it be the stand doesn't provide a level/flat enough surface, creating stress on the joints? Or maybe the repairs just weren't quite right.

[beaker]

I found the leaks, there were three. Scaped off all the caulk, which required three scrappings to get it all, and after removing all the old caulk. I washed all the edges three times with rubbing alocohol. allowed to completely dry for a day, and recaulked yesterday. Going to let the caulk cure for two days before putting water back in the tank. Then I will fill the tank and check for leaks bdfore I set it up again.
Can anyone see any flaws in my procedure?
Thanks

[neutrinoman]

Sounds like you've done your research and have the bases covered. This is one of the simpler how to descriptions I've seen: re-silicone.

Hope it works this time!

[beaker]

When the first leak occured in my 120g it was set up as a salt water, FOLR, fish only live rock, tank. The first leak occured i think because I had a deep sand bed with either pistol or mantis shrimp digging through it. I also had a sea cucumber sifting through the sand as well. You may not think a shrimp could brack a seal on an aquarium, but look up what these shrimp can do and it will change your mind.

[beaker]

I've just recently resealed my tank with the caulk you find at your lfs. And it has leaked again. Has anyone used this waterfall sealant available at lowe's with success? Link Below:
http://www.lowes.com/lowes/lkn?action=prod...0094-48650-WFFS& lpage=none
Thanks in advance for your input.

I went trought 5 razor blades scrapping and rescapping the old caulk out of this tank. I also completely rinsed all seam areas three times with rubbing alcohol. I also checked to make sure the tanks is level. And no the tank has not been moved since I put it where it is 5 years ago. I'm about to give and get rid of the tank, but my wife wants me to give it one more try. I hope this stuff works.
Thanks