Third party data processing

To improve our offer, we have information about user behavior by third parties processed.
Here we offer you the opportunity to individually agree to each individual data processing by third parties. Privacy

Essential cookies

Cookies, which are necessary for the proper operation of our shop.

Google Analytics

Analyzes website usage to deliver custom content.
Performs analytics to optimize website functionality..

Cookie lifetime: 2 years

Google Analytics eCommerce

Conversion tracking with the Google Analytics eCommerce extension.

Type of storage

May we save your settings permanently in the form of a cookie in your browser?
Otherwise, the settings will be lost when you close the browser window.


ROWAkalk 300 gr

ROWAkalk 300 gr

Lime water mix for sea water

  • has a purity of 98,2 %
  • dissolves quickly in reverse osmosis water
  • both for the mechanical and for the application in a reactor/mixer for lime water
  • Manufacturer:Rowa
  • Item number:155226
14,95 €

including 19% VAT ,

Recommended retail price: 14,95 €

Inhabitants of reef tanks require calcium for the growth of their skeletons & shells, consuming calcium and carbonate hardness from the water in large quantities, which requires replenishment.

ROWA®kalk is an extremely pure form of calcium hydroxide, which dissolves in water to produce Kalkwasser, a solution which reacts further within the aquarium to produce calcium, carbonate and bicarbonate ions. The fresh solution can be used to replace part or all of the daily evaporated water into your aquarium, depending on demand, and will also increase the pH value of your water.

Stir the ROWA®kalk vigorously by the spoonful into reverse osmosis water in a covered ideally transparent container. The water will turn milky and must settle and clear before use. Do not add the settled layer to the Aquarium and only make up as much kalkwasser as required, as the solution reacts with COin the air and loses strength.

The clear solution should be added to the Aquarium very slowly, drop by drop, into an area of high flow throughout the day, using either a peristaltic pump or by gravity drip feed (important as Kalkwasser has a high pH of 12,4).

Dosage: 1 - 4 teaspoons of ROWA®kalk per 5 Liters, dependent on coral stocking and type. Test Aquarium alkalinity regularly and adjust as required.

Calcium hydroxide

Danger! Causes skin irritation. Causes serious eye damage. May cause respiratory irritation.

Keep out of the reach of children. Avoid breathing dust/fume/gas/mist/vapours/spray. Wear protective gloves/protective clothing/eye protection/face protection.

In case of cantact with skin: Wash with plenty of water.

If inhaled: Remove person to fresh air and keep comfortable for breathing.

In case of contact with eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Dispose of contents/container in accordance with local/regional/national/ international regulations

Other customers have also bought the following items
Ecotech Marine Coral GlueEcotech Marine Coral Glue
starting from 18,90 €
Ocean Nutrition Green Marine AlgaeOcean Nutrition Green Marine Algae
starting from 6,30 €
CaribSea Purple UpCaribSea Purple Up
starting from 0,00 €
Ocean Nutrition Formula 2 FlakesOcean Nutrition Formula 2 Flakes
starting from 6,10 €
starting from 13,75 €
CoralRX Pro 30 mlCoralRX Pro 30 ml
23,90 €
Ocean Nutrition Formula 1 FlakesOcean Nutrition Formula 1 Flakes
starting from 6,10 €
Ocean Nutrition Spirulina FlakesOcean Nutrition Spirulina Flakes
starting from 6,10 €