Maximum Yield Cannabis USA November/December 2022 | Page 14

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Featured Contributors
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Dr . Lynette Morgan holds a B . Hort . Tech . degree and a PhD in hydroponic greenhouse production from Massey University , New Zealand . Lynette is a partner with Suntec International Hydroponic Consultants and has authored several hydroponic technical books . Visit suntec . co . nz for more information .
Contributors
Alex Basio Chris Bond Sebastian Carosi Kasey Craig Anthony Demeo Kent Gruetzmacher Jeffrey Lebold Karen Lloyd Lee G . Lyzit Michael Sassano Watermelon
PPM AND EC
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Dan Vaillancourt is the owner of 4 Trees Building , which designs and constructs grow facilities for ACMPR and recreational operators . His passion for plants and the science behind hydroponics began at an early age when he would take cuttings while on family hikes and grow them on the windowsill . He has been specializing in cannabis since 2001 . Find Dan on Instagram @ 4Treesbuilding . ca or at www . 4treesbuilding . ca .
VOLUME 5 NUMBER 6 November / December 2022
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Parts per million ( PPM ) and electrical conductivity ( EC ) are both measurements of the total dissolved salts in your solution . EC is the measurement of a solution ’ s ability to conduct an electrical charge . Pure water ( H 2O with nothing dissolved in it ) does not conduct electricity . The higher the solution ’ s salt concentration , the better it conducts electricity . A grower can easily measure EC with an EC meter . While this measurement will not tell you exactly how much nitrogen , phosphorus , or potassium is in your solution , it will give you an idea of the overall nutrient concentration . You can use this number to add nutrients to a recirculating system in between reservoir changes . Most feeding schedules will tell you what the PPM or EC should be at each week ’ s stage of growth .
Check out Dr . Lynette Morgan ' s article on page 24 for more information .
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