One of the mistakes I made was trying to become friends too soon. He was constantly afraid of me, because I tried to handle him about a week after I got him. He's going to need his space. This will help build trust, when he sees that you 1.) feed him and 2.) leave him alone. My bud Nik is also situated in my bedroom, but eventually he got used to me. I'm not suggesting that you are not capable, but I would say you should probably let him be for 2-4 weeks. That will help him warm up to you and accept you as "non-predatory". Also, I want to share a piece of advice. Waterfall systems are pretty and nice to look at, but they're a pain in the butt to keep clean. That place is practically a breeding ground for bacteria. If you have the time, energy, and commitment to keep it clean, go for it. However, I've also heard a lot of stories about waterfalls-gone-wrong, so I urge you to be careful.