Randy Holmes-Farley
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My Tank Thread
Copied from the duplicate thread:
Are you really wanting "perfect", or are you asking "good enough"?
Perfection is not well defined and certainly varies by organism.
Appropriate target levels (IMO):
PH: 7.8 to 8.55
Alk: 7-11 dKH
Magn: 1280-1400 ppm
Calcium: 400-550 ppm
NH2: no such thing
NH3: 0.1 ppm total ammonia or less (unless you are carefully dosing and controlling it)
Are you really wanting "perfect", or are you asking "good enough"?
Perfection is not well defined and certainly varies by organism.
Appropriate target levels (IMO):
PH: 7.8 to 8.55
Alk: 7-11 dKH
Magn: 1280-1400 ppm
Calcium: 400-550 ppm
NH2: no such thing
NH3: 0.1 ppm total ammonia or less (unless you are carefully dosing and controlling it)

