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kH Test Kit by Sera makes it easy to monitor the carbonate hardness in fresh and salt water.
SERA kH Test Kit 4 out of 1 5 based on 1 ratings. 1 user reviews.
- Efficient Review by JoeP32582
- Nice and easy. One drop equals one degree of kH. The color changes abruptly so there's no guessing involved. (Posted on 2/19/2009)