Nice tank, I have all my tanks in the basement except a 20 gallon because of the weight, I have 2-29, a 55, a 75, and a 125. So I'm hearing you on multiple tanks, I have downsized a bit and took down 2 tanks last year. It is addictive. I have read people keeping a single Jack Dempsey and it becoming a pet that reacts to you, my larger goldfish are like that, they watch me as much as I watch them.