I used this under my tank. I chose the aggregate design.
Before I installed the vinyl I made a rectangular frame out of 2x2, that was 10" wider/longer than the stand. I glued it to the floor with some dabs of PL400 adhesive. I then cut the vinyl to a size that allowed it to "roll" up, over, and down the outside face of the 2x2 frame, then glued vinyl to 2x2 with rubber cement (cheaper than what they sell and works fine). Now any spilled saltwater will be held inside the frame.
The saltwater does not harm the vinyl. I installed the same product on my pool deck 4 years ago and no issues.
I did not glue vinyl to concrete, no need to IMO.
In short. It looks good, keeps the water confined so it does not damage any other concrete or valubles on the floor, cheaper and easier than epoxy, do not need to repaint/epoxy every few years, can be moved to another location easily.
http://tufdek.com/product-category/vinyl-decking/
I should mention that they only sell to dealers, but may sell if it is a small enough piece. They do not want people to buy and install on a deck without training, bad installs make their product look bad.
I am an installer so it was not an issue to buy. There are other products out there like Duradek