Calcium is a chemical element with the element symbol Ca
Calcium is extremely important for most reef inhabitants, but especially for stony corals and lime red algae. Reef-building hard corals (SPS) require some calcium in high amounts for the skeletal structure. LPS hard corals have somewhat lower calcium content requirements.
In seawater aquaristics, especially the compound calcium carbonate is of importance. Calcium carbonate consists of about 40% calcium and 60% carbonate. Calcium / calcium carbonate must be added regularly to the aquarium as it is consumed by corals.
The regular measurement of the Ca content is extremely important for a reef aquarium, whereby it should be noted that the KH value (alkalinity) should also be measured at the same time. Because a calcium consumption leads, by the calcification to calcium carbonate, inevitably to a lower alkalinity
Also, the magnesium content of the aquarium water has an influence on the measurement result. Therefore, this value should always be determined simultaneously with the Ca and KH measurement and corrected if necessary.
By the way: a good growth of lime red algae or white growth tips on stony corals are a good indicator of sufficient existing calcium.
The GIESEMANN professional Ca test
- Very precise titration test
- Table for the determination of the calcium value
- Accuracy 5 mg per liter
- Precise dosing tip
- Very well recognizable color change
- Depending on the calcium content sufficient for 40-80 tests
- Detailed instructions for use
- Reaction vessel with lid
- Titration syringe with precision tip
- CA1 reagent
- indicator powder
- CA3 titration solution
- measuring spoons