The tank is 24L x 15W x 13H. I had to rehome my clownfish because they were being bullies in my other tank. Originally I thought about just doing a nem tank for them, but I am not sure. I am leaning Kessil, but I don't know which one would work for this size tank. Also would like a light that is programmable. I am confused as to whether or not the Kessils' are. I currently have a Red Sea aquarium with their light, which I like fine, but thought I might try something new. This is only my second tank. And I was planning on having this one. Lol