Seachem Reef Complete

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Seachem Reef Complete is designed to maintain calcium levels to how they should be in natural seawater, aiding the natural growth of your coral reef by mimicking the building materials they would use in the wild.


  • Reef Complete 250ml Sale
    code: seachem336 In stock More than 10 in stock
  • Reef Complete 500ml Sale
    code: 333 In stock Only 4 left in stock

Product Information

Restore levels of calcium with this perfect blend from Seachem. It will maintain the best levels without affecting the pH balance.

Super concentrated at 160, 000mg/l, this advanced product also contains magnesium and strontium.

Working together these three ingredients will maintain the vital amounts needed for the best coral growth and beautiful results.

Remember to order by 3pm to receive your order the next working day. Plus, if your order is over £50, then delivery is free!

Directions for Use:


  • use 5ml per 80 litres, twice a week.
  • Check calcium every two weeks and adjust amount or frequency accordingly.


  • Check calcium level, then follow dosing regimen above until calcium is adjusted to 380-420 mg/L.
  • Each capful will raise calcium by about 10 mg/L.
  • Size or frequency of amount added can be adjusted, but do not exceed 25 mg/L per day. Thereafter, use as required to maintain calcium.


  • After determining the calcium consumption rate, set up a continuous drip system.
  • Use the following formula to determine how much to add to your top-off water: m=0.025vc (m=mL of product to add to top off water, v=volume of tank in US gallons, c=amount to raise calcium in mg/L).
  • For example, if you want to raise calcium by 20 mg/L in a 50 US gallon tank, then you would add 0.025x50x20=25 mL into the top-off water.

Latest Customer Reviews

  • Rating
    Date 12/01/2016 08:01am
    Seachem Reef Complete 500ml
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