Sera Cl test A small amount of chloride in aquarium water is not harmful, but higher concentrations can quickly lead to the death of shrimp, lobsters and fish. Now, tap water in the Netherlands is in most cases virtually free of chlorine, but sometimes pipes are rinsed whereby chlorine concentrations can rise. Also, more chlorine is sometimes added to the water during hot days to prevent...

Mounting on the outside of the aquarium windows. Precise temperature measurement from 20 °C to 35 °C by the TH 35. Compact design. Mounting on the outside of the aquarium windows Temperature measurement from 20°C to 35°C Easy to read

Reliably and accurately measures carbon dioxide levels. Features: - for all freshwater aquariums - large range - good long-term stability Brand Tetra Summary Suitable for fresh and saltwater Large range Measures carbon dioxide levels accurately and reliably The Tetra Test Fe iron10 ML accurately measures carbon dioxide levels

Routine check or safety check: With the new Quick Test, sera offers the optimal possibility to check the most important water values in the pond quickly and easily - and that with only one test strip!Contents: 50 test strips.If the measurements show deviations from the optimal values, you can precisely determine the difference with the sera drop tests. The pH value carbonate hardness total...

To easily determine carbonate hardness in fresh and sea water

The Sera No3 (nitrate) test is to quickly and easily determine the nitrate value of your water. Good for +- 60 tests.

To easily determine the pH value in fresh and marine water and in the pond. For approx. 100 measurements. In case of too low pH values we recommend sera KH/pH-plus (in freshwater aquariums) or sera pond bio balance (in the pond), in case of elevated values in freshwater aquariums sera pH/KH-minus or filter over sera super peat.

Silicate (SiO3) promotes silica algae growth in marine and freshwater aquariums. You can safely and easily check the silicate level with the sera silicate-Test. A silicate level above 1 mg/l should be bound with sera marin silicate clear (freshwater and marine water).

Sera Cu test The Sera Cu (copper) test is to quickly and easily determine the copper value of your water. Good for +- 50 tests. Copper (Cu) is particularly toxic for invertebrates such as shrimps and crayfish, but fish also react very sensitively to elevated copper levels. Causes for a concentration of copper can e.g. be the varied origin, but also the result of drug treatments or measures to...

With the O2 (oxygen test) from Sera, you can easily determine the oxygen content of your water. Oxygen deficiency is very harmful for shrimps, crayfish and fish. Oxygen deficiency can be recognized by the presence of all animals at the water surface. Oxygen deficiency can occur especially during warm days. Sera's tests help you recognize oxygen deficiency early and prevent it. Sufficient for +-...

Sustainable silicate removal Silicate stimulates silica algae growth in marine aquariums. sera marin silicate clear binds silicate easily and permanently. sera marin silicate clear comes with a practical filter bag. Rinse briefly under running water before use and simply place in a filter or in a place with good water circulation. Operation - depending on silicate load - up to three months. 500...

The digital aquarium thermometer offers good measuring accuracy and can be easily glued to the aquarium glass from the outside. - Good measurement accuracy and healthy fish: Digital aquarium thermometer. - Easy to use: Stick on the aquarium glass from the outside. - Marking of the optimal temperature range. - Suitable for freshwater and saltwater.