Thanks guys and apologies for not updating earlier... the Angel did not survive the night, she was dead when I woke up in the morning and checked on her and to make matters worse, the Farlowella that was in the tank started looking lethargic as well, he was resting on his side. I had to leave to run some errands so I removed the dead fish and had to leave. While I was out, I decided to set up the 10g hospital tank and use water and media from the display tank so I wouldn't have to cycle as soon as I got home. I got home and immediately set up the tank in my basement office where the main tank is. I went upstairs to the QT tank and my Farlowella was dead
So I removed the remaining fish (2 neons, a common pleco and 2 young golden rams) and moved them to the hospital tank. I was super careful not to mix tools and supplies etc. and after acclimating the fish, I didn't let the net touch the hp tank water or drip water in to it.
It's been 4 days and so far no other fish have become lethargic, showed any signs of sores or marks or otherwise become unhealthy. I'm going to leave them in there for 2 weeks and if all goes well, I will move everyone to the main tank and probably won't keep a second tank going any more unless I need to QT or hospital.
Knock on wood, but at least my quarantine procedures seem to be working OK. I have yet to have anything like this happen in my main display tank, all disease issues I've had come up have been restricted to the QT tank to date.
For the QT tank, will washing everything in vinegar suffice to disinfect the aquarium and accessories?
Thanks!
Dan