^^^ +1 on all accounts.
In addition you never REALLY know what a used tank has been through in its life, the silicone could contain copper from medication or it could be on the verge of tank death.
Concept provides a year warranty on their tanks, they are also relatively inexpensive & have some of the best work in the industry.
More like once you go Concept you will never go back
.
and ya... Black all the way but I'm bias.