The best way to maintain calcium in a reef aquarium.
Calcium is an essential mineral supplement for marine reef aquaria. The simplest maintenance routine is to mix Kalkwasser and allow it to stand untle the solution becomes clear. Add it by dripping it in as top up water. If this is not done slowly via an automated top up system then a CO2 injector may be required.
Once the desirable calcium level is reached maintenance is relatively simple.
For Instant Calcium level elevation see Insta-Cal.