API GH/KH HardnessTest Kit

This kit tests general hardness (GH) and carbonate hardness (KH) in freshwater. GH shows the calcium and magnesium in your water, while KH shows how well it holds pH steady, so a low KH can explain sudden pH swings. It's useful when you're matching your water to fish that come from very soft or very hard water.

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Details

Category

Equipment & supplies

Brand

API

Tests for

General hardness (GH), carbonate hardness (KH)

Suitable for

Freshwater aquariums

What's included

GH test bottle, KH test bottle, 2 test tubes with caps, instructions