Help! My pictus cat is going beserk

I got a new pictus cat a couple days ago, and it's just going beserk. I know they're nocturnal fish and that they need a place to hide during the day. I am assuming that it's eating since all the chunks of meat I put in the tank are gone overnight. My tank lacks hiding spots and caves so the pictus is frantically swimming around the tank trying to find shelter during the day. I just dug a little opening in the gravel around a hollow ornament creating a cave. I'm not sure if my pictus will hide out there. If it doesn't does anyone have any ideas on how I can make it feel more comfortable?

Thanks for the ideas, I've already made a little cave for my pictus and it seems to like it. My severum tries to intrude on its lair, but my cat always gets a little agitated and pushes it out. I'll probably add a pvc pipe and a couple other hiding spots.