ph adjusterGeneral Hydroponics pH Control Kit (pH Up, pH Down, Test Indicator)★★★★★ 4.7~$22Buy Now on AmazonSee full details
ph-meter
Apera Instruments PC60 pH/EC/TDS/Temp Meter
★★★★½4.9 / 5
~$100Buy now on Amazon (opens in new tab)About this product
The four-in-one meter used in the examples throughout this article — measures pH to ±0.01 accuracy with IP67 waterproofing and a replaceable probe.
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