Your tank had 0 ammonia (NH4), 0 NitrAtes (No3) but what about nitrItes (No2)? If you meant 0 nitrItes and you have 0 nitrAtes something is wrong. Is the tank planted? That would be the only reason a cycled tank has 0 nitrAtes.
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Member of the AGA (Aquatic Gardner's Association)
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