sera guide - Healthy aquarium fish

Uncontrolled carbon dioxide addition, espe- cially at night, may become dangerous for the fish. An intoxication may lead up to apnea. Supply your plants safely and reliably with car- bon dioxide by using the seramic pH Con- troller. Lacking oxygen is likely if the fish suddenly dwell underneath the surface and gasp for air. This can be fatal in extreme cases. Even slight oxygen undersupply may cause deformations in young fish. Check the oxygen level with the sera O2-Test. sera O2 plus provides quick help in case of acute oxygen deficiencies. Use a sera air plus air pump if required. Check the hygienic conditions in the aquarium as to pre- vent oxygen deficiencies in the long term. A large amount of organic material compiles es- pecially in overstocked, abundantly fed tanks. Its breakdown consumes oxygen. Make sure you siphon off the sludge regularly. Also make sure the filter is well maintained and works ef- 8 Preventing and remedying maintenance mistakes and intoxications Simply pour sera filter biostart onto sera siporax. The filter will immediately become bi- ologically active. Add sera bio nitrivec to the aquarium water. The pollutant breakdown in the aquarium water will immediately begin or improve. Further intoxication causes Intoxications may be acute or gradual. Some- times the only symptom is that the fish startle more easily. A precise diagnosis according to the behavior and the appearance of the fish is thus often not possible. Therefore proceed very carefully when researching the causes if you observe the fish being unwell and cannot ex- plain it by the usual pathogens. Also consider unusual causes such as spraying insecticides in the room where the aquarium is located or having used self-built decoration elements (e.g. with unsuitable glue) in the tank. 44