I have a 315g community (my sig) in my home office and a 40 g in my living room. I personally feel that more tanks will be too much work/time consuming and will keep me from pursuing my other hobby (rock&ice climbing).....and how do you enjoy 20+ tanks ? lol ....do you spend 15 min in front of each one at the time? I guess I'm not as dedicated to this hobby as I thought I was lol