I have a young Jar about 5 inches. I have had him about 3 weeks. He looks very healthy and is eating well. My question is this-he never really swims. He just sits on the bottom of the tank all day. When I turn off the light then he becomes very active but always returns to the same spot at the bottom. He is in the tank by himself so he shouldn't be protecting his turf or anything like that. I just have never seen this behavior from an aro. I've have been keeping silvers for 7 years and am always captivated by aro's when I see them. I just am wondering if this is natural for Jardini's because this is my first Jar. Thanks for any help with this.