If your box has a spring loaded 510, then running a tank shouldn't be a problem. So long as the center pin on your tank protrudes from the bottom of the threads, you could potentially run a tank on any mod (Regulated/Unregulated Boxes/Mechs/Hybrids) without issue, but it's vital that the center pin protrudes. You can potentially run pretty much anything on a parallel box, so long as the Amp draw is within the range of the batteries. As long as you're running 2 Samsung 25R, Sony VCT4-5, or LG HG2, then you can even use the 0.2-0.5 ohm coils that are standard for sub-ohm tanks.
TLDR: As long as you have 2 Samsung 25R, Sony VCT4-5, or LG HG2 batteries in the mod, and the center pin protrudes, then you can run a tank at 0.2 ohms or higher