Grow Nutrient Lines
#1 – Advanced Nutrients
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Top Videos-Big Mike knows how to GROW HUGE
#2 – General Hydroponics
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#3 – Botanicare
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Top Video-Botanicare Scott talks about Pure Blend
#4 – Fox Farm
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#5 – Humboldt County’s Own
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#6 – Dyna-Gro
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Top Video-Hydro Nerds break down Dyna-Gro
PH UP & Down
#1 – GH PH UP & DOWN
![](http://hydro.shop/wp-content/uploads/2017/09/General-Hydroponics-pH-Control-Kit-150x150.jpg)
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#2 Dyna-Gro PH UP & DOWN
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Top Videos-Lex Blazer breaks down PH for MMJ Plants
Digital PH Pens
#1 – Blue Lab PHÂ
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#2 – Milwaukee PH
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Digital PPM Pens
#1 – Blue Lab PPM
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Top Video-How to calibrate your BL PPM Pen
#2 – HM Digital TDS
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Top Comments-Roll It Up & check that PPM
Top Video-Monster Gardens show off the HM Meter