Parameter	Freshwater Community	African Cichlid	Freshwater Plants & Discus	Brackish	Pond
Temperature	72 - 82°F	72 - 82°F	76 - 86°F	72 - 82°F	33 - 86°F
pH	6.5 - 7.5	7.8 - 8.5	6.0 - 7.5	7.5 - 8.4	6.5 - 7.5
Ammonia	0.0	0.0	0.0	0.0	0.0
Nitrite	0.0	0.0	0.0	0.0	0.0
Nitrate	< 50 ppm	< 50 ppm	< 30 ppm	< 50 ppm	< 50 ppm
Alkalinity (Carbonate Hardness)	4 - 8 KH	10 - 18 KH	3 - 8 KH	10 - 18 KH	4 - 8 KH
General Hardness	4 - 12 GH	12 - 20 GH	3 - 8 GH	12 - 20 GH	4 - 12 GH

Parameter	Suggested Level: Reef Aquarium	Suggested Level: FOWLR Aquarium	Average Level: Coral Reefs
Specific Gravity	1.023 - 1.025	1.020 - 1.025	1.025
Temperature	72 - 78°F	72 - 78°F	82°F
pH	8.1 - 8.4	8.1 - 8.4	8.0 - 8.5
Alkalinity	8 - 12 dKH	8 - 12 dKH	6 - 8 dKH
Ammonia (NH3)	Undetectable	Undetectable	Near Zero
Nitrite (NO2)	Undetectable	Undetectable	Near Zero
Nitrate - Nitrogen (NO3)	< 1.0 ppm	< 30 ppm	0.25 ppm
Phosphate (PO4)	< 0.2 ppm	< 1.0 ppm	0.13 ppm
Calcium	350 - 450 ppm	350 - 450 ppm	380 - 420 ppm
Magnesium	1250 - 1350 ppm	1150 - 1350 ppm	1300 ppm
Iodine	0.06 - 0.10 ppm	0.04 - 0.10 ppm	0.06 ppm
Strontium	8 - 14 ppm	4 - 10 ppm	8 - 10 ppm