I have a 20 gallon long that I would classify as 8/10 for quality. It was used as a sump in a NVR friends build. It was given to me, I cleaned it all up and used it as a QT for fish and coral for 6 months. I am now giving it back to someone who made want or need it as a sump, QT, Hospital ETC. Edit** Has never seen copper or any QT medications. Never had to actually treat a fish for any disease. Also comes with a free Aqua Clear 20 or someone can take separately. No delivery, pick up in Pacifica.