Store >  Additives >  Calcium Additives | Kalkwasser >  [ Seachem Reef Kalkwasser 2 kg (4.4 lbs) ]


Seachem Reef Kalkwasser 2 kg (4.4 lbs)

Product #AD-SC399


Availability: Temporary not available

Description: Seachem Reef Kalkwasser 2 kg 4.4 lbs. is a pure calcium hydroxide with unsurpassed purity and solubility characteristics, and is used to prepare kalkwasser solutions to maintain calcium concentrations.
Brand: Seachem


Product Information




Seachem Reef Kalkwasser 2 kg (4.4 lbs)

Seachem Reef Kalkwasser. Kalkwasser solutions maintain calcium directly and carbonate alkalinity indirectly. However, its capacity to perform these functions is dependent on evaporation rate and CO2 concentration. If the these two factors are insufficient you can provide additional calcium with Reef Advantage Calcium, Reef Complete, or Reef Calcium, and carbonate alkalinity with Reef Builder or Reef Carbonate (do not mix these directly with a kalkwasser solution).

DIRECTIONS: Never add this product directly to the fish tank. Add 3 g (1 teaspoon) to 4 L (1 gallon*) of water and mix to dissolve. If using pure water, a fully saturated solution is prepared by adding 6 g (2 teaspoons) to 4 L (1 gallon*). Drip this solution into the fish tank. Monitor pH and carbonate alkalinity. Adjust rate of addition to maintain a stable pH (8.3 to 8.4).

HINTS: Adding 4 L (1 gallon*) of a saturated kalkwasser solution to 150 L (40 gallons*) will raise calcium by 24 mg/L.

Always use the clear supernatant (top solution) only and do not allow undissolved material to enter the aquarium. Keep this container tightly closed when not in use and minimize solution/air contact to avoid calcium carbonate formation/precipitation. Avoid contact or breathing dust. Do not eat or get in eyes. In case of contact, flush area with water for 5 to 10 minutes. In case of eye contact, wash eyes with water immediately (5 to 10 minutes) and seek medical attention.


  • Weight: 6.6 lb
  • Height: 8 in
  • Width: 7.9 in
  • Depth: 7.9 in
Usually ships same day

AD-SC399

Product Rating

  • No reviews for this product have been submitted

Place Order


List Price: $46.19
Our Price: $30.79
  (save $15.4, 33%)
Temporary not available
Add To Wish List


Related Products

Seachem Reef Kalkwasser 1 kg (2.2 lbs)
List Price: $22.49
Our Price: $14.99
(save $7.5, 33%)
Seachem Reef Kalkwasser 500g (1.1lbs)
List Price: $16.49
Our Price: $10.99
(save $5.5, 33%)



FAQ/Wiki


Hydroponic Supplies


Wholesale Accounts