Your online garden supply store offering organic fertilizers, natural pest control, organic gardening equipment and more.

Earth-friendly products for home, lawn & garden.

• Home
|
• About Us
|
• e-Newsletter
|
• Free Catalog
|
• How To Order
|
• Customer Service

ph. 800-289-6656

• Organic Lawn Care
  • Lawn Fertilizers
  • Push Reel Mowers
  • Weed Control
• Organic Fertilizers
  • Dry Fertilizer
  • Foliar Fertilizer
  • House Plant Fertilizer
  • Liquid Fertilizer
• Soil Care
  • Potting Soils & Mixes
  • Soil Amendments
  • Soil pH & Test Kits
• Composting
  • Compost Bins
  • Compost Equipment
  • Worm Composting
• Greenhouse Supply
  • Cold Frames
  • Greenhouse Accessories
  • Greenhouse Kits
• Heirloom Seeds
  • Heirloom Flower Seeds
  • Heirloom Herb Seeds
  • Heirloom Vegetable Seeds
  • Organic Seeds
• Natural Pest Control
  • Barriers & Repellents
  • Beneficial Insects
  • Biological Pest Control
  • Fungicides & Plant Disease
  • Home Pest Control
  • Insect Traps & Lures
  • Natural Pesticides
  • Soaps, Oils & More!
• Garden Supplies
  • Gardening Equipment
  • Plant Protection
  • Seed Starting
  • Sprayers & Applicators
• Pond Care
• Indoor Garden Supply
  • Air & Water Pumps
  • Climate Controllers
  • CO2 Systems
  • EC, TDS & pH Testing
  • Growing Media
  • Hydroponic Nutrients
  • Hydroponic Supplies
  • Hydroponic Systems
  • Plant Propagation & Cloning
• Grow Lights
  • Accessories & Parts
  • Fluorescent & Spot Lighting
  • Grow Light Reflectors
  • Grow Light Remote Ballasts
  • Grow Light Systems
  • HPS Lamps & MH Bulbs
• Healthy Homes
  • Earth-Friendly Products
  • Natural Body Care
  • Natural Cleaning Products
• Natural Pet Care
  • Natural Flea Control
  • Pet Shampoo & Pet Supplies
• OMRI Listed
• Bookstore
• Planet Natural Gear
• Gift Certificate

VISIT OUR
TOP BRANDS

• 
• 
• 
• 
• 
• 
• 
• 

BECOME A FAN ON FACEBOOK FOR UPDATES AND SPECIALS.

DIG DEEPER

LAWN & GARDEN
ADVICE

• How to Compost
• Hazardous Harvest (GMOs)
• How to Grow Tomatoes
• Dangerous Backyards
• Sustainable Gardening
• How to Grow Vegetables
• Growing Herbs Indoors

GOT
BUGS?

PEST
PROBLEM
SOLVER

Identify your problem and get a complete list of earth-friendly solutions.

• Garden Pests
• Household Pests
• Tree Pests
• Houseplant Pests
• Landscape & Lawn Pests
• Plant Diseases

HAVE
QUESTIONS?

VISIT OUR
GARDEN
FORUM

Hear what other gardeners have to say.

EC/ TDS & pH Testing

EC/ TDS & pH Testing is extremely important for successful hydroponic gardening. The pH of a solution controls the availability of nutrients the plant is able to uptake. If the nutrients are present but the pH is incorrect, the plant will not be able to absorb the nutrients and will be deficient. Electrical conductivity (EC) is a measurement of dissolved solids in water. These dissolved solids conduct electricity. EC is measured in milli-siemens per centimeter (MS/CM). Total dissolved solids (TDS) is also a measurement of the dissolved solids in the nutrient solution, but is measured in parts per million (PPM). Both EC and TDS are measurements of the strength of the nutrient solution.

Home | Indoor Garden Supply  | EC, TDS & pH Testing

Electrode Storage Solution (HI 70300) To minimize clogging and ensure fast response time, always keep the glass bulb and the junction... Price: $17.50	Earth Juice Natural Up Raise pH with these all natural pH adjusting crystals. Earth Juice Natural pH Up can be used to adjust... Price: $17.50
pH Probe Cleaning & Calibration Kit Probe cleaning is one of the most important parts of owning and operating any Bluelab meter or monitor. Price: $35.95	Conductivity Probe Cleaning Kit The instrument is only as accurate as the probe is clean! Price: $23.50
General Hydroponics pH-Up To maximize plant growth, the pH of your nutrients should be slightly acidic. Experienced growers consider the ideal pH... Price: $11.95	General Hydroponics pH-Down To maximize plant growth, the pH of your nutrients should be slightly acidic. Experienced growers consider the ideal pH... Price: $11.95
Bluelab Guardian Monitor In just one glance it magically measures all three critical parameters for healthy plant growth; pH, conductivity and temperature. Price: $344.95	Earth Juice Natural Down Lower pH with these all natural pH adjusting crystals. Earth Juice Natural pH Down can be used to adjust... Price: $15.95
pH Test Indicator pH is a measure of how acidic or alkaline your hydroponic nutrient solution is. The pH scale goes from... Price: $6.95	pH 7.0 Calibration Solution We recommend that you calibrate you pH meter regularly. pH 7.0 pH Calibration Solution is all you need for... Price: $6.95

1 2 3 4 Next Page Show All
Displaying items 1 through 10 of 34 total items