Should I be worried?

ryleary · Jan 16, 2015

I purchased this 42g corner tank on CL from a guy who said it was a couple years old and it was full before I picked it up with no leaks. I tested it by filling it up for 48 hours and it held fine. Didn't have a drop of water outside the tank. I emptied it and let it sit with a small amount of water and went to give it one more clean and saw what looks like condensation behind the silicone at the base. I checked with my finger and none of the silicone was pulling back and it looked like a good seal, but the condensation bubbles have me a little worried.

Reefing Madness · Jan 16, 2015

Thats just a silicone bead along the seems, the true seem is inbetween the glass panels, thats what makes it water tight, and bonded together, not the bead along the seems.

143MPCo · Jan 16, 2015

Looks like they resealed it, I wouldn't get any sleep with something like that!

143MPCo · Jan 16, 2015

Reefing Madness said:
Thats just a silicone bead along the seems, the true seem is inbetween the glass panels, thats what makes it water tight, and bonded together, not the bead along the seems.

I agree, but if its been resealed they would have had to cut the old silicone away compromising some of the integrity of the boned ends, no?

Reefing Madness · Jan 16, 2015

The outter silicone won't affect the silicone between the panes, to hard to get there.
I don't even have the outter bead on my 240g tank, just what inbetween the panes, and then you can see a bubble or 2 in that bead. I'd not be to concerned about it. That silicone bond inbetween the glass is pretty tough.