For many indoor and outdoor growers, the question of whether to reuse soil after harvest is both economic and envir...
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Description
Essentials pH Test Kit will do up to 150 tests. At a frequency of 3 tests per week, it will last you one year, which is an excellent purchase for a good price. It covers the pH range of 4.0 - 8.5 measurements in 0.5 increments.