Aquarium Systems Reef Evolution ReefKalk 500g
ReefKalk 500g is a specialized calcium supplement designed for reef aquariums. It helps maintain optimal calcium levels in the water, which is essential for the health and growth of corals and other reef-dwelling organisms.
Key Features
- Provides essential calcium for coral growth and skeletal development
- Formulated to support stable water chemistry in reef tanks
- Easy to dissolve and mix into aquarium water
| Specification | Value |
|---|---|
| Product Name | Reef Evolution ReefKalk |
| Weight | 500g |
| Form | Powder |
| Use | Reef Aquarium Water Chemistry Adjustment |
FAQ
How often should I add ReefKalk to my reef tank?
The frequency depends on your tank’s calcium levels and coral growth rate. Check water parameters regularly and add according to test results. Typically, a small amount every 1-2 weeks is sufficient for stable conditions.
Can ReefKalk be used in freshwater tanks?
No, ReefKalk is specifically designed for saltwater reef aquariums and should not be used in freshwater systems.
Is ReefKalk safe for fish and invertebrates?
Yes, ReefKalk is formulated to be safe for fish, invertebrates, and coral life when used as directed.

Joshua Mackay –
I’ve been using ReefKalk for three months now and my corals have grown noticeably. The calcium levels stay stable, and my tank looks healthier than before. Easy to mix and no issues with water clarity.
Jack Rutherford –
Good product, helps maintain calcium levels. I added it every two weeks based on test results. My polyps are more active and the tank feels more balanced.
Christopher Forsyth –
After switching from a generic calcium supplement, I noticed a difference in coral color and growth. ReefKalk works well with my existing water parameters and is easy to use.