Salifert Strontium Profi-Test Kit
In a marine aquarium, strontium plays an important role in accelerating the growth of coral and calcareous algae. Natural sea water contains approximately 7 to 9 mg/L of strontium.
Strontium is difficult to test for. When calcium levels in the aquarium are found to be low, strontium levels are likely to be similarly low as well. It is recommended to maintain strontium concentrations between 5 and 20 mg/L.
The Salifert Strontium Profi-Test Kit is the first test kit introduced by Salifert to measure both ionically free and moderately complex strontium in increments of 5 mg/L.
| Test Parameter | Measurement Range |
|---|---|
| Ionically free and moderately complex strontium | 5 to 20 mg/L (in 5 mg/L increments) |
FAQ
What is the recommended strontium level for a marine aquarium?
The recommended strontium concentration for a marine aquarium is between 5 and 20 mg/L.
How does this test kit differ from other strontium test kits?
This kit is the first to measure both ionically free and moderately complex strontium, providing a more complete picture of strontium availability in the water.
Is strontium testing necessary if calcium levels are normal?
Please contact customer service

Ruth Bailey –
The test kit is easy to use and gave accurate results. I noticed better coral growth after adjusting strontium levels based on the readings. Very reliable for monitoring water parameters.
Virginia Smith –
It’s a bit more complex than standard test kits, but the instructions are clear. I appreciate that it measures both free and complex strontium, which helps me better understand my tank’s chemistry.
Stephanie Martin –
Used it regularly in my reef tank. The results matched what I saw in my coral health, and I’ve been able to maintain stable strontium levels without issues.