That video is a re-enactment.
Okay to try and answer the questions. I paid $25 for him and had him shipped from Florida but I'm afraid I can't say more because the seller is a competitor of this fine website
. The tank is a 12 gallon JBJ NanoCube that has been fallow for a couple of months after I had a heater malfunction and cooked my seahorse and some of his buddies. I did some research and found that O. mercatoris does well in a tank this size as does O. joubini although they are harder to come by.
I pulled all the filter media out of the back of the tank and added LR rubble in poly mesh bags and I run ChemiPure back there also in case he inks. Lighting is standard and even though he's nocturnal he's gotten used to the lights and comes out fairly often.
I feed him fiddler crabs and the occasional emerald crab for a treat. Amazingly I added two chromis to the tank and he ate one immediatley and the other is still alive after 2 weeks! I do however see the octopus stalking him sometimes. Don't know if it's just playing or he just can't catch the little guy.
So far I haven't proofed the tank as he doesn't show any interest in leaving but he does climb in the back filtration area sometimes but comes out if I open the lid and lift the LR bag he's hiding under. I think he goes back there to eat amphipods as there are literally hundreds in this little tank from sitting with nothing in it for a long time except for 16 lbs of LR.
Thanks for your interest everyone. More pictures soon.