Just my luck, the tank is leaking.

So I was finally got this all setup and then about midnight last night I awoke to the sound of dripping. It appears the tank has a small weep somewhere around the bottom seal. Drained it last night and tried filling again today and have not been able to pinpoint the leak, but it only starts leaking at about 85% full. Any advice? Should I just tear it all down and reseal? I tested it a couple time before putting it on the stand and it was fine.

Bummer man....

If you are unable to pinpoint the leak coming from anywhere else besides the tank I am afraid it's time to tear it down.

On a previous tank, the bottom seal of the tank would open up enough to leak when the tank was over 90% full (or 80% with heavy rocks inside). Probably time to tear down and reseal.