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Combo pH & PPM Meters Combo pH & PPM Meters
Displaying 1 to 11 (of 11 products)
 Replacement pH Electrode for 24-7 Nutrient Monitor 
 Replacement pH Electrode for 24-7 Nutrient Monitor 
 CW505 
 $49.95 
  
 Replacement Power Adapter for 24-7 Nutrient Monitor 
 Replacement Power Adapter for 24-7 Nutrient Monitor 
 CW507 
 $14.95 
  
 Replacement PPM Electrode for 24-7 Nutrient Monitor 
 Replacement PPM Electrode for 24-7 Nutrient Monitor 
 CW506 
 $49.95 
  
 Grocheck Combo Constant Read Meter 
 Grocheck Combo Constant Read Meter 
 HY179 
 $209.95 
  
 Grocheck Combo Meter 
 Grocheck Combo Meter 
 HY177 
 $234.95 
  
 Grockek Combo 
 Grockek Combo 
 HY1743 
 $239.95 
  
 Hanna COMBO Tester (HI98129) 
 Hanna COMBO Tester (HI98129) 
 HY1741 
 $172.95 
  
 HI1285-6 Replacement Probe 
 HI1285-6 Replacement Probe 
 HY1771 
 $114.95 
  
 Replacement ph Probe Electrode for HI98129 and HI98127 
 Replacement ph Probe Electrode for HI98129 and HI98127 
 HY17411 
 $59.95 
  
 Replacement Probe for GroChek 
 Replacement Probe for GroChek 
 HY1801 
 $54.95 
  
 Replacement Probe for HI9919404 
 Replacement Probe for HI9919404 
 HY17431 
 $101.95 
  
Displaying 1 to 11 (of 11 products)
Hydroponic Systems
Complete Hydroponic Systems
Growing Containers
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Hydroponic System Cleanser
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Lighting
Complete Lighting Systems
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Metal Halide Lamps
High Pressure Sodium Lamps
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Environmental Controls
Timers
Thermostats & Humidistats
CO2 Monitoring Equipment
CO2 Generators
Fans and Blowers
Air Filters
Odor Control
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Ozone Generators
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Nutrients
Organic and Natural Plant Foods
Refined and Soluble Plant Food
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Bloom Enhancement Additives
Water Conditioners
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pH Adjusting Chemicals
Meters
pH Test Kits
pH Meters
PPM Meters
Combo pH & PPM Meters
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Moisture Meters
Calibrating Buffers & Solutions
Growing Mediums
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Rockwool
Hydroton & Other Volcanic Rock
Soil-less Mixes
Soil & Worm Castings
Vermiculite
Perlite
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Heat Mats
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Insect Control
Beneficial Insects
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Plant Washes
Miscellaneous
Books
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Label Stakes
Measuring Tools
Microscopes and Magnifiers
Plant Supports
Spray Bottles
Watering Tools
Electrical Accessories
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