I recently set up a new tank (I moved). I purchased a 20 Extra High with a Marineland Eclipse hood.
I set up the tank on a Saturday, squeezed a packet of Bio-Spira in, and let the filter run overnight. The next morning, I added 21 fish: 10 Serpae Tetras, 3 Marigold Swords, 6 Guppies, and 2 Angelfish. About 2 days later the ammonia flashed to a whopping .25 PPM and then over the next few days dwindled down to an undetectable level.
About 2 weeks later I added two Spotted Corydoras. The ammonia level is still below a detectable level.
So far, only one fish has died (a guppy - someone nipped her tail). The water in the tank is nice and clear. The fish look happy.
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