sera guide - Marine aquariums

52 9.6 Checking the water Parameter When to check? Ideal parameter Value too high – lower ⇓ Value too low – raise ⇑ pH weekly KH Carbonate hardness weekly Ca Calcium weekly Conductivity weekly Density weekly NH4/NH3 Ammonium/ Ammonia weekly NO2 Nitrite weekly 8.0 – 8.5 8 – 12 °dKH 400 – 450 mg/l (ppm) 50 – 54 mS/cm 1.022 – 1.024 g/cm3 at 25°C (77°F) ideal: 0.0 mg/l (ppm) dangerous from 0.02 mg/l (ppm) depending on the pH value ideal: 0.0 mg/l 0.3 – 0.9 mg/l (ppm) NO2 [equals 0.1 – 0.3 mg/l (ppm) NO2-N]: water pollution from 0.9 mg/l (ppm) NO2 [equals 0.3 mg/l (ppm) NO2-N]: danger for fish 3.3 mg/l (ppm) NO2 [equals 1.0 mg/l (ppm) NO2-N]: acute danger to fish life ⇓ • Partial water change with more acidic water • Add CO2 ⇑ • sera KH/pH-plus ⇓ • Partial water change ⇑ • sera KH/pH-plus ⇓ • Partial water change ⇑ • Add sera marin COMPONENT 1+2 Calcium ⇓ • Partial water change with water of little less conductivity ⇑ • Add sera sea salt in small portions until the correct value is achieved ⇓ • Add sera marin bio reefclear • Check the filter • Feed sparingly • Check whether a fish or another animal is missing • Partial water change • Remove cause ⇓ • Partial water change • Repeat partial water change after 12 – 24 hours ⇓ • Partial water change (check pH value) • Avoid still water zones by providing water currents (use a powerhead) • Add sera marin bio reefclear • Check/clean the filter • Reduce number of fish • Feed sparingly ⇓ • Partial water change ⇑ • Add sera sea salt in small portions until the correct value is achieved