Tests for Nitrate and Nitrite (25 per bottle) - 641426
If you are seeing excess chlorine demand and algae growth check your Nitrate/Nitrite levels with AquaChek Nitrate/Nitrite Test Strips.
DIRECTIONS:
1. Dip strip in water for 60 seconds. Do not shake off excess water.
2. Hold strip level with pad side up for 30 seconds.
3. Compare test strip to bottom pad color chart on the side of the bottle.
4. After 60 seconds, compare test strip to top pad color chart on the side of the bottle.