Two Little Fishies Kalkwasser Calcium Supplement
High-quality calcium supplement for reef aquariums
Calcium hydroxide mix replenishes calcium and maintains aquarium alkalinity
Essential reef supplement for healthy growth of corals, clams, and calcareous algae
| Specification | Detail |
|---|---|
| Active Ingredient | Calcium hydroxide |
| Form | Supplement solution |
| Package Size | 1 pound |
| Function | Replenishes calcium, maintains alkalinity, precipitates phosphate |
FAQ
How often should I add the Kalkwasser supplement to my reef tank?
Add according to your tank’s calcium and alkalinity levels, typically every 1-2 weeks depending on water conditions and biological activity.
Does this supplement affect water pH levels?
It helps maintain alkalinity and supports stable pH in reef tanks, but does not significantly alter pH on its own.
Can this product be used in freshwater aquariums?
Please contact customer service

Yvonne Cameron –
This supplement has made a noticeable difference in my coral growth. The water clarity improved and my clams are thriving. I use it every two weeks based on test results and it’s easy to mix.
Joanne Knox –
I’ve tried several calcium supplements, but this one is the most reliable. It keeps my alkalinity stable and helps prevent coral bleaching. The instructions are clear and the product is easy to handle.
Emily Peake –
After using this for a month, my calcareous algae grew well and the water looks cleaner. No phosphate buildup, which was a problem before. I’m very satisfied with the results.