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Factory calibrated: The COM-80 meter is calibrated with a 1413 µS solution
Use to time fans
This generally fixes any problem
With 5 hole sizes
Bluelab pH Up Size:Bluelab pH Up 1 Liter Bottle (Case of 12) Factory calibrated: The COM-80 meterOptimum growth needs optimum pH. And Bluelab makes optimum simple. If your pH isn't in the right rangeand that's 5. 5 6. 5 for most plant varietiesyour nutrients are likely wasted. Too high or too low, and you're in trouble. The result is nutrient deficiency or complete nutrient lockout. A sure way to unhappy, unhealthyeven dyingplants. Bluelab pH Up Solution is formulated to the highest standards. Just add what's required to raise pH. Your plants
