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Ships within 48 hours · Estimated delivery Sep 4 - Sep 9
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Description
SeaChem Reef Kalkwasser 500 gmVery pure calcium hydroxideIdeal for increasing calcium in top off waterIncreases pH with no impact on carbonate alkalinityReef 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,
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
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Best in 7 days
Best in 7 days
Best in 7 days
Best in 7 days
4.2 ★★★★★
Based on 1469 reviews
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Product Reviews
★★★★★ 5
Top of the line high quality
Top of the line great filter
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Reviewed in the United States on March 24, 2026
★★★★★ 4
Good fit works well, once I figured installation
Does not show air flow direction
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Reviewed in the United States on January 22, 2026
★★★★★ 5
Good product
Excellent product, fast delivery, good price. I would recommend this company.
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Reviewed in the United States on February 8, 2026
★★★★★ 5
Fits Honda clarity
Easy and correct fit for Honda clarity
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Reviewed in the United States on May 26, 2026
★★★★★ 5
Works Great
I bought this filter for a friend that smokes in the car. Helps reduce the smell a lot. Just make sure it is installed in the right direction.
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Reviewed in the United States on September 20, 2025
