Here are the water quality ranges for the most common types of pet fish. Click here to find water quality requirements for more exotic fish species.
Parameter Range Ammonia ≤ 0.1 mg/L (ppm) Nitrite 0 mg/L Nitrate < 20 mg/L pH 6.5-9.0 kH (alkalinity) > 100 mg/L gH (hardness) > 100 mg/L Temperature 32-85F (0-29C)
Parameter Range Ammonia ≤ 0.1 mg/L (ppm) Nitrite 0 mg/L Nitrate < 20 mg/L pH 6.5-9.0 kH (alkalinity) > 100 mg/L gH (hardness) > 100 mg/L Temperature 32-85F (0-29C)
Parameter Range Ammonia ≤ 0.1 mg/L (ppm) Nitrite 0 mg/L Nitrate < 20 mg/L pH 7.0-8.5 kH (alkalinity) > 100 mg/L gH (hardness) > 100 mg/L Temperature 78-82F (25-28C)
General Tropicals Water Quality Ranges
Parameter Range Ammonia ≤ 0.1 mg/L (ppm) Nitrite 0 mg/L Nitrate < 20 mg/L pH 7.0-8.5 kH (alkalinity) > 100 mg/L gH (hardness) > 100 mg/L Temperature 78-82F (25-28C)
Please keep in mind these are general guidelines – not all fish read the book!
