Reseal or Not?

  • We are currently upgrading MFK. thanks! -neo

rhite

Feeder Fish
MFK Member
Jul 22, 2011
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I bought a used 125g. I filled it up and it did not leak. My questions is would you suggest resealing it since it is used and I have it empty or do you think it will be ok if it is not leaking now? This is the largest tank I have ever owned and the first used tank I have bought. Do most of you reseal used tanks before setting them up?
 
I never reseal used tanks that I get. If they need to be resealed, I will not buy them. Did the previous owner reseal the tank do you know? or is it original silicone? What type of shape is the tank in? I would leave it with water in it for a few days, then start setting it up if it doesn't leak.
 
I always look at the silicone seams on used tanks once I get them home. I use a very bright light and check that there is no missing or lifted edges anywhere. If they look as good as a brand new tank, I still leak test the tank for a week but make sure the tank is on a flat, level and secure surface.

I have yet to buy a used tank that met all these requirements, so I strip the interior silicone, remove any residual silicone skin, clean thoroughly, prep all sealing surfaces with denatured alcohol or acetone, let dry and caulk. I prefer to let the silicone cure for 1 week and then water test for an additional week. I haven't had a single failure using this method, so I'm comfortable with doing it this way.
 
The guy I got it from was using it until he upgraded to a 175. I filled it up and left the water in it for a week, only because I was lazy and didn't feel like draining it. In general the tank is in great shape. I will take the advice and look at all the seams with a bright light. I have a problem with patience, lol. I want to get this set up! Just don't want to walk in one day and find 125g of water on my hardwood because I skipped a step do to impatience.
 
if the silicone looks like it needs resealing then i would reseal it. it always better to be safe then sorry.
 
Thanks to everyone.
 
Yeah the only way i would recommend resealing is if you bought it and the person you bought it from said it needed a reseal or how old is the tank i mean i bought my 150 gallon tank knowing it needed to be resealed and it was made in 1998 so knowing that i did it myself and Its sturdy and holding water for a year and a half now (knock on wood)... But i agree with everyone else if you have a gut feeling that single piece of long silicone has a tare or cut into and you dont trust it i would do the reseal job. Cant go wrong with the Quote (better safe than sorry).
 
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