Very Soft Soft Hard Very Hard
Safe Caution Stress Danger
Safe Unsafe
FRESHWATER COMPARISON CHART
NITRATE (NO3
+) ppm (mg/L) – FRESHWATER
0 20 40 80 160 200
NITRITE (NO2
-
) ppm (mg/L) – FRESHWATER
0 .5 1.0 3.0 5.0 10.0
TOTAL HARDNESS (GH) ppm – FRESHWATER
0 25 75 150 300
TOTAL CHLORINE ppm – (mg/L) – FRESHWATER
0 0.5 1.0 2.0 4.0 6.0
TOTAL ALKALINITY (KH) ppm – FRESHWATER
0 40 80 120 180 300
pH – FRESHWATER
6.2 6.8 7.2 7.8 8.4
Low Moderate Ideal High
Acidic Neutral Alkaline
Safe Danger
Safe Caution Stress Danger
NITRATE (NO3
+) ppm (mg/L) – SALTWATER
0 20 40 80 160 200
NITRITE (NO2
-
) ppm (mg/L) – SALTWATER
0 0.5 1.0 3.0 5.0 10.0
TOTAL ALKALINITY (KH) ppm – SALTWATER
0 40 80 120 180 300
Not Desired Ideal
pH – SALTWATER
7.0 7.4 7.8 8.4 8.8
Too Low Acceptable Ideal Too High
THIS PAD NOT APPLICABLE FOR SALTWATER TESTING
TEST YOUR TAP WATER FOR TOTAL CHLORINE.
ONLY ADD SALT AFTER YOU HAVE REDUCED
THE TOTAL CHLORINE LEVEL TO SAFE LEVEL.
Ideal Okay Unsafe
SALTWATER COMPARISON CHART
The colors as viewed on your monitor will not be as accurate as those printed on the color chart included with the test strips you
have purchased. We recommend using the chart on the Tetra EasyStrips 6-in-1 bottle for best results.