Step 2: So now...
First things first. Set up your aquarium.
Add fish
Let them hang out for a few days, so they get settled in.
This may also be the best time to set up your light source and timer.
You need the light to be on for a 12hr cycle. 12 on 12 off. this is great for a set it and forget it type of person (like myself)
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You just have to run your aquarium fishless for 2 to 3 weeks. When ammonia, and nitrites have disappeared and there is a low concentration of nitrates, then put the fishes in.