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This kit has everything necessary to learn whether ponds, lakes, wetlands, rivers and streams are healthy for fish and wildlife. It utilizes analytical, drop-count titration and color disc colorimetery to test for acidity (1 drop = 2.27 mg/L or 5.46 mg/L as CaCO3), alkalinity (6.84–342 mg/L), carbon dioxide (5–100 mg/L), hardness (0–513 mg/L), dissolved oxygen (0–10 mg/L) and pH (4–10). Each kit includes enough reagents for 100 tests (pH up to 300 tests). Weighs 5 lbs.