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Quantity
1
Plants get their food from minerals - but they can only uptake those minerals if they are made bio-available by feeding at the correct Ph. Think of nutrients like a lock, and pH is the key. A key factor that affects nutrient uptake is whet...
Reviews
5.0
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Great ph pen
Great pen. Had my previous one for 3 years. This was a replacement. Wish they had a longer life span (1-1 1/2 years).
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Cgurtler · April 5, 2024
pH Pen
Using Bluelab products is always a good experience as their products are amongst the top tiers for quality & reliability.
The ph pen works wonders & it's a must as my tap water comes out at 7.8 to 8.1 which my plants will use but won't flourish to their near fullest potential.
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Chad · January 20, 2024
Bluelab PH Pen
Really accurate, easy calibration and easy to use.
Don't waste your time n money on cheaper pens, go Bluelab.
