Question: Leak? Pressure point? Start over? Ugh

Hi.
I just got my tank (second hand) and I'm so excited

This is the first fill... I washed and rinsed it really well with vinegar and water 2 days ago... Put it on a foam matt (camping matt.) cut to size, and filled it today.


Once filled, I was admiring it, and noticed a blue spot on the bottom of the tank... Maybe the mirror finish was missing on the bottom

So hubby tried sliding a skinny pointy object between the matt and the tank, thinking it may give the water (if that's what it is) a way out... 20 minutes later it looks like this

So... There can only be 2 possible explanations:
1. There was some moisture left on the bottom after I washed it, that I missed between drying and setting the aquarium up on the mat
2. There is a leak in the aquarium... The only reason I am leaning towards #1 is that how is it possible to just leak in middle of a thick piece of glass (not near a seam)? Without having it someplace near the edge? Hmm... Very peculiar

And, IF it is #1, will this create a weak spot, and the foam underneath is now useless? Could my tank now shatter because of the 'drip'??

Ughh :blush:

Wayer or 'air' bubble

Oops, that was supposed to say WATER or air bubble

Here it is after fiddling around, shaking the tank, it's been about 35 minutes now...
There shows a little condensation in another back area, but no other 'drips'

It looks like when water is trapped between two sheets of glass ... Very odd.

I know, right?

If this is normal, then great...
I'm thinking of starting over (65 gallons ) but what if this is just the way it will be again, and just has to work its way out? That will not make me happy...

Anyone have a similar experience?

Many have read my post, but had no input/experience, so I thought I would update. Just in case somebody has this problem in the future...

I emptied the tank, and lifted it to find a lonely, "trapped" drop of water. I expect it would not have gone away anytime soon by itself. It was under the tank, and above the Matt. I have no doubt it was leftover from cleaning the tank with a hose.

Once we wiped it dry with a paper towel, re-positioned the tank so we can stand a filter and/or chiller next to it, and filled it up again, it's perfect.



I really did not want to find out the hard way, if this 'drip' could have made a difference in my aquarium's stability (shattered tank?) :errr:

Now back to cycling...