t5Nitro,
We appreciate your detailed questions! The warranty will not be voided if your package is not signed for upon delivery. However, if you will not be home and the package will remain outside for a long period, we would strongly recommend that you either have the package shipped to a different location or leave a note on the door asking Federal Express to set the package in a safe location.
When housing 2 tangs in the same aquarium we recommend adding them at the same time to avoid any aggression. Also, the least aggressive fish should be added first so they can establish their territory before the more aggressive fish are added. The Dispar Anthias should be one of the first additions to your aquarium to establish territory first.
Most Tangs and Surgeons are not known to be aggressive towards other tank mates. However, the Powder Brown Tang is a very passive fish that can have trouble with other Tangs, so we would recommended adding this fish to your 125 before adding your yellow tang. You should not have a problem with adding your Clownfish today, dependent on the species as Yellow Striped Maroon and Maroon clownfish tend to be very territorial and aggressive, and the Tangs at later date.
We hope this is information helps with your decision!
Cassie Z.
LiveAquaria
Drs. Foster and Smith