I'm new to growing.What does ppm stand for.
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Critical Mass - Oaseeds
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Critical Mass
Custom Breeder & Strain
VEG
LED/40W
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Day 17
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They are growing pretty quickly and are healthy. watered them at pH 4 by mistake so flushed them with plain water pH 5.8
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Ritamurp1495commentedweek 65 years ago
Ritamurp1495commented5 years ago
@BarrieGrower,thanks
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BarrieGrowercommented5 years ago
@Ritamurp1495,
Parts per million. It's used to measure the quantity or amount of minerals in the solution.
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