The tang question is one for the ages but I`ve had mine for 8 yrs now. the last 1 1/2 in my 125 and the first 6 1/2 in a 55, and yes I agree that they need plenty of space. Liveaquaria recommends at least 50 gallons for the YT. I guess I`m the bad guy for liking his choices. But I was doing it based on experience and experts advice.