Color Chart Freshwater Aquarium Water Testing Chart. My api master freshwater test kit came with the saltwater color chart instead of the freshwater chart. Soooooo.i just realized something after 2 weeks of freaking out about my nitrate levels and doing daily water changes trying to fix them.

Soooooo.i just realized something after 2 weeks of freaking out about my nitrate levels and doing daily water changes trying to fix them. All along i was thinking my nitrate levels were at 160ppm when in reality they were at around 40. My api master freshwater test kit came with the saltwater color chart instead of the freshwater chart.