sera guide - Splendid plants in your aquarium

The sera high quality safety non-return valve protects CO2 fertilization systems and air pumps against entering aquarium water. • Valve body made of high quality plastic material (2) with silicone conus (4), pres- sure spring (3), O-ring seal (5), can be dis- mantled for cleaning • Connectors with union nuts (1) for hoses with 4/6 mm diameter • Contains 2 pieces The sera CO2 safety non-return valve pre- vents aquarium water flowing back into the pressure reducer. The valve must be installed between pressure reducer and connected devices, e.g. a reactor. The sera CO2 long-term indicator perma- nently monitors the CO2 level in the aquarium water. The kit consists of the test container, indicator liquid and a comparing chart. How much and when must CO2 be added to the aquarium? A certain CO2 amount is required, depending on the CO2 consumption by the plants and the desired pH value. As a first approxima- tion, it is advisable to add about one or two CO2 bubbles per minute for every 10 liters (2.6 US gal.) of aquarium water into the dif- fuser or reactor. The optimal CO2 dosage per minute may be considerably higher, depend- ing on how strongly the plants react with in- creased growth and/or if the desired pH value is in the slightly acidic range (e.g. 6.5). The CO2 level in the water is easy to monitor with the sera CO2 long-term indicator. Al- ternatively, installing a seramic pH Con- troller is recommended. 17 Plants do not perform photo synthesis at night, but they take up oxygen while CO2 is being formed. CO2 addition therefore should be interrupted at night. A common timer in combination with the sera CO2 solenoid valve is suitable for this pur- pose. The addition of CO2 Tabs should preferably take place in the morning. sera Tip 1 2 3 4 5 2 1 !!