sera guide - Marine aquariums

53 Parameter When to check? Ideal parameter Value too high – lower ⇓ Value too low – raise ⇑ NO3 Nitrate weekly Mg Magnesium weekly PO4 Phosphate weekly Cu Copper Fresh water Fish feeling unwell O2 Oxygen every 2 weeks Cl Chlorine Water change New setup ideal: maximum 20 mg/l (ppm) from 20 mg/l (ppm) above 100 mg/l (ppm) about 1300 mg/l max. 0.1 mg/l (ppm) ideal: below 0.05 mg/l (ppm) ideal: 0.0 mg/l (ppm) (every de- tectable amount severely harms invertebrates or is fatal to them) above 1.0 mg/l (ppm): fatal for all living beings in marine aquariums above 6 mg/l (ppm): sufficient oxygen below 0.02 mg/l (ppm) ⇓ • Use 1 liter (1 US quart) sera siporax per each 100 liters (26 US gal.) of wa- ter in the biofilter. To do so, activate the filter with sera marin bio reefclear • Carry out frequent partial water chan- ges with water that is low in nitrate • Reduce fish stock if applicable • Feed sparingly • Use a protein skimmer • Partial water change ⇓ • Partial water change ⇑• Add sera marin COMPONENT 6 magnesium ⇓ • Partial water change • Add macro algae • Feed sparingly • Reduce number of fish ⇓ • Add sera aquatan • Generous partial water changes with copper-free water, prepare fresh wa- ter with a double dose sera aquatan ⇑ • Rapid increase with sera O2 plus • Aerate water • Find out and remove cause ⇓ • sera aquatan neutralizes the effects of chlorine • Add sera marin bio reefclear • Aerate water well