Water Testing Help

API Freshwater Master Test Kit: read it and know what to do next.

Use this two-page poster set for directions, action ranges, and safe first steps. Always follow the product label and match your response to the fish and aquarium in front of you.

Ask Gigi About Your ResultsFreshwater Testing Guide
Page 1

Directions, pass readings, and first fixes.

Check the chart in good light, use a timer, and do not mix treatments or make sudden water changes based on one uncertain result.

API Freshwater Master Test Kit directions poster with pass, caution, fail, and fix guidance for ammonia, nitrite, nitrate, and pH
Page 2

PPM action chart.

Use the action chart to decide when to monitor, perform a careful partial water change, or contact Gigi for help.

API Freshwater Master Test Kit ppm action chart for ammonia nitrite nitrate and pH
Important: Ammonia and nitrite should be 0 ppm in an established freshwater aquarium. For a concerning result, send Gigi a clear photo of the test tube beside the color chart, your tank size, fish, and any recent changes.