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Aquarium Cycling Test Results

Supplement to the August 2008 FAMA article Cycling Your Tank.

David A. Lass

Over the next few days I fed the fish in tank #1 and #2 and added enough ammonia to tank #3 to keep the ammonia level at around 5.

Date Tank 1 Tank 2 Tank 3
  # Fish NH3 NO2 NO3 # Fish NH3 NO2 NO3 # Fish NH3 NO2 NO3
11/18/2007 8 0.0 0.0 0 2 0.2 0.0 0 0 6.0 0.0 0
11/20/2007 8 0.1 0.1 70 2 0.3 0.0 0 0 4.0 0.0 0
11/22/2007 8 0.1 0.1 70 2 0.2 0.2 100 0 4.0 0.0 0
11/25/2007 8 0.1 0.0 70 2 0.1 0.1 90 0 4.0 0.2 90
11/27/2007 8 0.0 0.0 80 2 0.1 0.3 80 0 4.0 0.2 80
11/28/2007 8 0.2 0.4 80 2 0.2 0.2 30 0 3.0 0.1 30
11/30/2007 8 0.0 0.0 80 2 0.2 0.3 20 0 5.0 0.1 20
12/01/2007 8 0.0 0.0 100 2 0.3 0.4 30 0 3.0 0.2 30

On December 3rd I did a 25 percent water change on all three tanks. Four fish were added to tank #2.

Date Tank 1 Tank 2 Tank 3
  # Fish NH3 NO2 NO3 # Fish NH3 NO2 NO3 # Fish NH3 NO2 NO3
12/06/2007 8 0.0 0.0 50 6 0.4 0.5 45 0 4.0 0.4 50
12/09/2007 8 0.7 0.5 80 6 0.7 0.2 60 0 4.0 0.3 65
12/15/2007 8 0.8 0.5 80 6 0.6 0.1 45 0 1.0 0.1 50

On December 16 I did a 25 percent water change to all three tanks, and I added two fish to tank #2 and eight fish to tank #3.

Date Tank 1 Tank 2 Tank 3
  # Fish NH3 NO2 NO3 # Fish NH3 NO2 NO3 # Fish NH3 NO2 NO3
12/18/2007 8 0.0 0.0 40 8 0.1 0.0 50 8 0.1 0.2 65
12/21/2007 8 0.0 0.0 40 8 0.0 0.0 45 8 0.5 0.2 65

On December 22 I did a 25 percent water change to all three tanks.

Date Tank 1 Tank 2 Tank 3
  # Fish NH3 NO2 NO3 # Fish NH3 NO2 NO3 # Fish NH3 NO2 NO3
12/24/2007 8 0.1 0.0 20 8 0.1 0.0 35 8 0.3 0.1 60

On December 27 one fish died in tank #1. It was replaced with another fish.

Date Tank 1 Tank 2 Tank 3
  # Fish NH3 NO2 NO3 # Fish NH3 NO2 NO3 # Fish NH3 NO2 NO3
12/28/2007 8 0.1 0.0 40 8 0.1 0.0 60 8 0.1 0.0 60

On December 29 I did a 25 percent water change on all three tanks.

Date Tank 1 Tank 2 Tank 3
  # Fish NH3 NO2 NO3 # Fish NH3 NO2 NO3 # Fish NH3 NO2 NO3
12/31/2007 8 0.0 0.0 20 8 0.0 0.0 30 8 0.1 1.0 20
01/08/2008 8 0.0 0.0 20 8 0.0 0.0 30 8 0.0 0.0 35

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