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Natural Seawater Mimicking
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coral-shop Reefkeeping Concept - CS Concept Step by Step
07 - Seawater Exchange
Marine Salts
CS Marine Salt
Water Exchange / Additives - I
Water Exchange / Additives - II

CS Marine Salt is a professional, 2-component marine salt of highest commercially attainable purity, intended for reef tanks. Product guarantees the following benefits for made seawater: Naturally identical composition - Perfect homogeneity - Highest commercially attainable purity.


We recommendregular water exchange in the amount from 5% for large tanks to 20% for smalltanks monthly. Nevertheless, the best solution is automated continuous waterexchange. 

More information about seawater exchange can be found in the articles linked bellow. In simple words, the following shall be considered by all reefkeepers:

  • Each reef tank is unique, with different depletion rate of nutrients, while marine salt composition is always fixed. Seawater exchange as a sole tool for seawater chemistry maintenance will never work in a long run and cannot replace the role of additives.
  • Majority of commercial marine salts is enriched with trace and minor elements - boosted salts. This is presented as an advantage - which is not.

The seawater exchange versus additives options:

Boosted Salt - No Additives

  • Problem: Imbalance of nutrients
  • Critical time: 12 - 18 months

Boosted Salt - Use of Additives

  • Problem: High concentration of nutrients
  • Critical time: 6 - 18 months

Naturally Concentrated Salt - No Additives

  • Problem: Low  concentration of nutrients
  • Critical time: 12 - 22 months

Naturally Concentrated Salt - Use of Additives (CS Concept)

  • Correct concentration of nutrients
  • Long-term stable environment

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