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🌊 Keep your reef thriving with science-backed purity and precision!
Seachem Reef Kalkwasser is a premium-grade calcium hydroxide powder designed to prepare limewater solutions that maintain calcium and carbonate alkalinity at natural seawater levels. With unmatched purity and solubility, it supports stable reef tank chemistry by replenishing essential minerals. Trusted by hobbyists for over 30 years, this product ensures precise dosing and effortless integration into automated reef systems, promoting vibrant coral growth and long-term aquarium health.
| ASIN | B0002A5WP6 |
| ASIN | B0002A5WP6 |
| Age Range Description | All Life Stages |
| Best Sellers Rank | #124,087 in Pet Supplies ( See Top 100 in Pet Supplies ) #1,137 in Aquarium Water Treatments |
| Brand Name | Seachem |
| Customer Reviews | 4.5 4.5 out of 5 stars (80) |
| Date First Available | June 15, 2004 |
| Date First Available | June 15, 2004 |
| Department | Home & Garden |
| Department | Home & Garden |
| Directions | Never add this product directly to the tank. Add 3 g (1 teaspoon) to 4 L (1 US 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 US gallon). Drip this solution into tank. Monitor pH and carbonate alkalinity. Adjust rate of addition to maintain a stable pH (8.3–8.4). Notes: Adding 4 L (1 US gallon) of a saturated … |
| Is Discontinued By Manufacturer | No |
| Item Dimensions LxWxH | 7.5 x 5 x 4.9 inches |
| Item Package Dimensions L x W x H | 7.52 x 4.92 x 4.88 inches |
| Item Weight | 1.1 Kilograms |
| Item model number | 116039802 |
| Item model number | 116039802 |
| Manufacturer | Seachem Laboratories, Inc. |
| Manufacturer | Seachem Laboratories, Inc. |
| Material | Cotton |
| Model Name | reef Kalkwasser 1 kg |
| Number of Items | 1 |
| Product Dimensions | 7.5 x 5 x 4.9 inches; 2.43 Pounds |
| Size | 250 g |
| Specific Uses for Product | habitat |
| Target Audience Keyword | dogs, fish, house-cats |
E**.
Great way to keep your Calcium and Alkalinity stab;e
I've used this product for over 6 months in my 125G reef tank and it has consistently kept my calcium and alkalinity in the 440ppm and 7.5 respectively. My PH is always around 8.2 and I use it in my ATO and I have not had any problems with it. Would definitely buy it again in a few months when it runs out.
F**K
Works great!
All corals are happy, some happier after switching from 2 part. Dosing it thru my ato 15g container. Very simple...alc came up nicely to about 8.5 Calcium at like 460...no complaints.
D**9
Ph booster
I use it on my top of water to help me boost my ph and it does it very well
B**D
Big container
First purchased and mixed as a slurry versus an ATO/ mixer, easy to use and directions are simple. as advertised.
R**R
Very affordable
Ive bought kalk from my lfs at twice the price. Very good product, I mix it with my auto top off and my calcium level is above 400 ppm. This has led me to very good growth on my corals and my coraline algae.
F**M
Good Kalk
Worked well
T**I
it work really good fast but careful too much it burn fish my ...
it work really good
P**Y
Five Stars
outstanding purchase
T**E
Stabilized my Alk and Cal
J**M
Use carefully
A**R
Product is exactly what is advertised. Price OK. Follow the directions
Trustpilot
1 month ago
3 weeks ago