I used to observational qt only. And then got lazy. And my tank got hit. But special thanks to @HotRocks and @4FordFamily who have been coaching me through the entire process. With their help I was able to avoid losing any fish due to velvet with exception to the fish that brought the disease into the tank. But with their help I got all the meds I needed, got the qt tank setup and copper dosed. My fish are alive and well now. Thanks @HotRocks and @4FordFamily!!
Absolutely! I have read through a lot of what has been posted, and it's partially why I'm planning to start. I have most of the listed meds and I'm about ready to start. Just have one more biz trip next week, then I'm going to order a few (no more than 3 this round) new fish and go through a full QT following these recommended steps.