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Kalkwasser Stirrers

Deltec Kalkwasser Stirrers Deltec Kalkwasser Stirrers are ideal in supplying the marine aquarium with saturated "Kalkwasser". When connecting the Deltec Kalkwasser Stirrers to an automatic water level top-up system the supply of "Kalkwasser" to the aquarium is automatic. Deltec Kalkwasser Stirrers can be operated in combination with Deltec Calcium Reactor with positive effect.

Translates from the German for limewater and is a solution made by dissolving Calcium 

Hydroxide in water.

The resultant fresh solution is alkaline with a pH of 12.4 and contains a ready supply of 

both Calcium ions and Carbonate ions.

Both of these ions are useful to the aquarist as the Calcium ions are available to the 

corals and the Carbonate ions help to buffer the pH. There is an added benefit in that 

kalkwasser also precipitates phosphates from the water.

If the evaporated water loss is replaced with kalkwasser then it will add calcium and 

offer the other benefits described above.

Unfortunately fresh Kalkwasser is unstable and reacts with CO2 in the air rapidly 

diminishing in the level of free calcium.

For this reason it is necessary to continually make a fresh solution and to keep it 

away from the atmosphere.

This is where the Kalkwasser stirrer comes in to play as it continuously makes up 

fresh saturated solution as it is used up.

Note that great care must be taken when administering Kalk due to the great affect 

that it has on the ph of the aquarium

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