Reef Former Concentrate with Strontium


Just shake up bottle and add a couple of capfuls to a gallon of distilled or deionized freshwater and presto!, you have Kalkwasser. If you used or heard of Kalkwasser, this makes it a breeze to prepare. NatuReef Reef Former Concentrate contains only pure Calcium and Strontium to help keep your aquarium water in the ratio found in natural sea water. Each bottle 16oz can make more than 30  gallons of Kalkwasser at half saturation.

  • Encourages growth of pink and purple coralline algae.
  • Keep pH levels elevated.
  • No powdery mess like other Kalkwasser products.
  • No extra Strontium required.
  • One of the most beneficial additions to almost any marine aquarium environment.

NatuReef Reef Former Concentrate with Strontium is available in 16 fl oz. a bottles.


Water evaporation is a big problem with all marine aquariums. Exposure to air, along with the circulation of water throughout the filtration system (overflow pipes, protein skimmers, etc.) cause significant evaporation of water to occur. Replacement of the evaporated water is essential and required regularly. Because the salt stays in the aquarium as the water evaporates out, a higher salinity occurs, which can be damaging to the ecosystem.

Adding “make-up” water provides a great opportunity to replenish essential minerals, like calcium and strontium, to a marine aquarium. Calcium is essential to the health of virtually every creature in a marine environment, including corals. Kalkwasser, which is calcium hydroxide and is also known as “limewater”, is one of the most effective and natural ways to replenish depleted calcium. By mixing Reef Former Concentrate with purified water, you can create the benefits of calcium replenishment from Kalkwasser while compensating for water evaporation. Also, the regular addition of the calcium hydroxide will keep the pH elevated to desired levels.

Remember, it is crucial to use purified (distilled or deionized) water for water replenishment. Never use ordinary tap water. Cutting corners by not using purified water can create havoc in a marine aquarium by introducing impurities to a pristine environment that has taken so much time and energy to create.

Directions: Shake bottle until all solids have been suspended in solution. Add one ounce (or three capfuls) per one gallon of distilled or deionized water. Cap tightly and repeat process when the next gallon is required,

Caution: Keep away from children and pets. Avoid contact with skin and eyes. Do not ingest. For marine aquarium use only.