SKU: 10362896880

Seachem Kalkwasser

Sale price$184.50 Regular price$205.00
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Description

Seachem KalkwasserSeachem Reef Kalkwasser Seachem Kalkwasser is used to prepare limewater solutions that maintain calcium concentrations at natural seawater levels and increase pH without impacting carbonate alkalinity. Very pure calcium hydroxide Ideal for increasing calcium in top off water Increases pH with no impact on carbonate alkalinity Seachem Reef Kalkwasser is a pure calcium hydroxide with unsurpassed purity and solubility characteristics. Calcium hydroxide

Seachem Reef Kalkwasser

Seachem Kalkwasser is used to prepare limewater solutions that maintain calcium concentrations at natural seawater levels and increase pH without impacting carbonate alkalinity.

  • Very pure calcium hydroxide
  • Ideal for increasing calcium in top-off water
  • Increases pH with no impact on carbonate alkalinity

Seachem Reef Kalkwasser is a pure calcium hydroxide with unsurpassed purity and solubility characteristics. Calcium hydroxide is used to prepare limewater (kalkwasser) solutions that will maintain calcium concentrations at natural seawater levels. 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 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).

Many who use kalkwasser are quite successful with their marine systems and find it to be an effective way of maintaining calcium. However, it can be a difficult technique for the beginner to master. The carbonate alkalinity must be monitored and adjusted to ensure that it does not become depleted through chalk (calcium carbonate) precipitation. The magnesium concentration must also be monitored and maintained since precipitation of magnesium hydroxide (arising from excess hydroxyl ions) can lead to a change in the balance of the various buffer systems present which can result in drastic pH shifts. Additionally, magnesium is an essential component of seawater that is required by all corals. There will be an increase in the build up of chalk on substrate and plumbing surfaces which will require more frequent cleanings in order to maintain the proper functioning of the aquarium. If due care and diligence is paid to all of these factors, there is no reason one cannot maintain a successful reef system while using kalkwasser. While Reef Kalkwasser™ is a high purity and economical limewater mix, the beginner, or someone with not as much time to devote to their system, may prefer to use other less involved methods for maintaining proper ionic concentration levels.

Directions

Never add this product directly to the 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 tank. Monitor pH and carbonate alkalinity. Adjust rate of addition to maintain a stable pH (8.3–8.4). 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 5–10 minutes. In case of eye contact, wash eyes with water immediately (5–10 minutes) and seek medical attention.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
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  • Delivery to the USA:
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Exchange/Return Notes
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  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
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SKU: 10362896880

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Rob
Lexington, US
★★★★★ 4
Nice Glow Just Sticky
Color: 03 Glistening Bronze
I was really excited to try this body glow oil, especially since it has SPF 45, getting sun protection and a bronzed shimmer all in one sounded perfect. The color is beautiful and gives a nice glow without looking too glittery, which I appreciate. However, it does feel a bit sticky right after application. I ended up lightly dusting some setting powder over it, which helped a lot to take down the tackiness and make it feel more comfortable throughout the day. Just a heads-up: you don’t need a lot of product, start with a small amount and build up if needed. It absorbs fairly quickly but still leaves that dewy finish, so it might not be ideal if you’re not into that slightly glossy feel. Overall, though, I really like the effect, especially for photos or a night out. Just takes a little trial and error to get it to work how you want!
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Reviewed in the United States on June 20, 2025
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Markayla Heidelburg
Louisville, US
★★★★★ 5
Glitter that body
Color: 03 Glistening Bronze
This smells amazing and the color pops! The perfect amount of glitter. I wish they sold bigger bottles.
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Reviewed in the United States on September 10, 2025
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thecustomer
Draper, US
★★★★★ 1
Horrible
Color: 02 Diamond Platinum
Worst spf ever. Did absolutely nothing! It is sticky and gross and I got super sunburnt wearing it.
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Reviewed in the United States on January 24, 2026
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Katrina
Boise, US
★★★★★ 5
Pretty sheer sparkle for your skin
Color: 02 Diamond Platinum
I really enjoyed this product. Normally I am not a glitter person but this is not like normal glitter products. You dont end up with glitter everywhere forever. The sun protection is not great, though I did not purchase for that reason. Definitely use regular sunscreen and then apply this. It is great for festivals, concerts, renfaire etc.
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Reviewed in the United States on September 17, 2025
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Carter
Lake Worth, US
★★★★★ 3
Gives a glow
Color: 03 AMBER
Doesn’t give as much of a shimmer but more so a glow and evens out skin tone.
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Reviewed in the United States on August 18, 2025

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