02-21-2013, 11:46 PM
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Bare bottom, sponge filter and a heater with minimum if any decorations.
The benefit of this, you can see the bottom of the tank to see how much waste is accumulating and it makes it easier to vacuum.
Sponge filter assuming no medications are used, which shouldnt be unless a disease is present, can be stored in the back of the main tank when not being used, this will keep it cycled, allowing you to store away the QT tank.
Having live plants and substrate can make it extremely difficult if you have to medicate a fish or fishes. It as mentioned, can kill live plants and with substrate means if you use any medications, you should ideally wash the substrate.
QT for a minimum of 3 weeks and fully observe the fish, some diseases take time to show up, I QT any new fish for a full 6 weeks. Making sure that the fish is eating, pooping normally and totally disease free.