but assuming you sleep a normal 8 hour day, your other fish are exposed to 16 hours of possible illness already. Do you really think that 8 hours is making a difference besides possibly losing the oxygen in the water for your fish? What your doing makes not honest logical sense, im not trying to flame you, but figure out your reasoning behind it.
Also i do not quarantine my fish before hand. Then again, aside from my 1 flowerhorn, I only get fish from two different places and both have very good owners