Easy to test:
1. Dip an aquarium testing strip into water for 2 seconds.
2. Remove it and hold horizontally for 30-60 seconds.
3. Compare with color chart in 2 minutes.
Reliable Material:
These aquarium test strips are crafted from reliable fiber paper, providing instant and accurate results without color bleeding. Applicable for both fresh and marine water, such as aquariums, fish tanks or ponds.