ph meterApera Instruments PC60 pH/EC/TDS/Temp Meterβ
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4.9~$100Buy Now on AmazonSee full detailsSee full comparison
nutrients
Masterblend 4-18-38 Tomato & Vegetable Formula
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Β½4.7 / 5
~$20 for 1 kgBuy now on Amazon (opens in new tab)About this product
The powder base for the Masterblend three-component system described in this article β mixes with calcium nitrate and Epsom salt at $0.02β0.05 per gallon.
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ec meterBluelab Truncheon Nutrient Meter (EC/TDS/CF)β
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