I want to add some more hiding places for my catfish so they'll stop hiding behind the heater, and I feel I can add some non-stem plants but I can't decide on what. Please ignore the lack of background I hope to add a black background soon^^

I have never tried cups in a aquarium, but the alternative styrofoam lasts forever! I would use it for my nocturnal catfish, he needed a place away from my guppies. Please advise!!! :fish: MandM2