• Calcium and carbonates are the two most important elements in seawater, which are required in relatively high amounts and thus have to be added separately through Colombo Calcium+ and KH+.


    Colombo All-Four contains all other macro and micro-elements that corals need for an optimal growth and a perfect colour development, like magnesium, iron, iodine, potassium and many more. Based on the Calcium test, you add Colombo Calcium+. Add 50 ml Colombo All-Four for every 100 ml of Calcium+ you are adding to your tank.


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  • Too high a silicate or silicic acid content is the main reason for the presence of silica algae (brown algae). By removing the silicate with Silicate Ex, the algae can no longer grow and disappear.


    Normally a maximum silicate content of 0.50 mg/l is acceptable, but to remove silica algae, the content must be temporarily reduced to 0.


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  • The Colombo test stirrer is the ideal aid for testing the water. The stirrer keeps the water sample moving so that you have both hands free to administer the reagnet carefully.


    For tests that work on the basis of the so-called titration principle, the stirrer ensures easy testing and accurate results.


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