I don't QT myself because I lost more fish in QT than I ever lost in the display tank. I'm a picky buyer though. That helped. It took me forever to stock my 90. I've stocked the tank so far without QT but used some old school techniques to reduce the associated risks... but I knew it was still a risk. I have a few more fish to buy once the supply chain stabilizes. I'll buy QT'd fish from here on out. I have a lot of healthy fish in the tank now, so extra money is certainly worth it. It's like insurance. You pay a little bit, but shift the risk of paying more for a loss during QT to someone else while still greatly reducing the risk of bringing something bad into the population.