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24-7 Nutrient Monitor pH, PPM, Temperature
The 24–7 Nutrient Monitor is a great all around meter for nutrient applications needing constant monitoring. It measures PPM, pH and Temperature and with its large illuminated display it is easy to read from a distance. Calibration screws are conveniently located on the front for easy access. All 24-7 meters sold include 4-ounce bottles of buffer solutions for calibration.
Price: $209.95
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Dolomitic Lime 4 lb
This high calcium and magnesium powder lime is perfect for adding to soilless mixtures for container growing and into garden beds. Can be used to adjust pH or as a supplemental source of calcium and magnesium. For outdoors apply 5-6 lbs per 100 square feet or according to your soil pH test. In containers use from 2-4 tbs per gallon depending on your soil mix. 1 cup of lime is approximately equal to 1 lb and 5 tbs of lime equals 1/4 cup. Contains 21% calcium and 11% magnesium
Price: $3.95
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Dolomitic Lime 50 lb
This high calcium and magnesium powder lime is perfect for adding to soilless mixtures for container growing and into garden beds. Can be used to adjust pH or as a supplemental source of calcium and magnesium. For outdoors apply 5-6 lbs per 100 square feet or according to your soil pH test. In containers use from 2-4 tbs per gallon depending on your soil mix. 1 cup of lime is approximately equal to 1 lb and 5 tbs of lime equals 1/4 cup. Contains 21% calcium and 11% magnesium
Price: $12.95
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EcoTestr pH1 Waterproof Meter
The EcoTestr pH1 meter is an accurate pH meter for the hobby grower. It has a pH range of 0-14.0 with an accuracy of +/-0.1. The calibration is a simple 1 point with push button control. An easy to read LCD display with a hold function, plus auto off after 8.5 minutes of non use. Batteries are included.
Price: $70.95
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EcoTestr pH2 Waterproof Meter
The EcoTestr pH2 meter is an accurate simple to use tester with plenty of features to satisfy an exacting hydroponic enthusiast. It has 3-point calibration, plus automatic temperature compensation with an accuracy of +/- 0.1 It has an easy to read LCD display and hold button to make reading of your pH levels a breeze. Add in an auto off function to save your batteries, this pH meter is a joy to use. Batteries are included.
Price: $85.95
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Hydrated Lime 5 lbs.
Hydrated Lime can quickly raise the pH of soil. A proper pH helps plants grow by making more nutrients in the soil available to them. It can be applied directly to the soil or mixed with water . Use care that you do not apply too much. A soil pH reading should be taken before applying this lime.
Price: $8.95
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Soil pH and Moisture Meter w/ 12" Probe
The Accurate 8 is a professional pH and Moisture Meter with a 12" probe to allow the checking of pH and moisture levels at multiple depths. Accurate to +/- 0.2 pH. Now you can check your soil pH levels and moisture levels with confidence. Allowing you better control of your fertilizing schedules leading to superior plant growth.
Price: $69.95
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TDS Calibration Solution 3 oz
Calibrates TDS/PPM/EC meters. It is rated a 1000 ppm for meters requiring the NaCl solution calibration. Those meters requiring a KCL solution it is rated at 1060 ppm, those needing a "442" solution it reads 1450 ppm and for EC meters it reads 2000. You just need to know what type of solution your meter requires. It has a 6 month shelf life after opening.
Price: $6.95
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TDS Meter
A simple, easy to use and economical in price, this TDS meter from HM Digital will measure the total dissolved solids (TDS or ppm) of your nutrient solution. Measuring your TDS will allow you to more efficiently use your fertilizer by letting you know when to replace your solution. Plus, it will prevent the accidental over fertilization by letting you know if your fertilizer level is too high. Be a better grower and use a TDS meter to get the best results from your fertilizer. This meter is not waterproof.
Price: $39.95
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Waterproof EC/TDS/Temp Combo Meter
An easy to use, reliable combo meter that can measure electrical conductivity (EC) or total dissolved solids (TDS) and temperature of your nutrient solution. These measurements, EC, TDS give you an overall idea of how much nutrient you have in your solution. It will help you in managing your fertilization of your plants and allow you to use your nutrients more efficiently. To display the measurement of your choice simply turn the meter on, press through the "HOLD/MODE" button until you have the display read "ppm" for TDS or "uS" for EC. The temperature can be displayed in Celsius or Fahrenheit using the "TEMP/CAL" button. Can be calibrated with KCL or 442 or NaCl solution. All this and it is waterproof too.
Price: $74.95
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pH Calibration Solution 4.0 8 oz
A standard calibration solution for pH meters to 4.0. 8 oz bottle
Price: $6.95
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pH Calibration Solution 7.0 8 oz
A standard reference solution for calibrating pH meters to 7.0. 8 oz bottle.
Price: $6.95
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pH Down Dry 2.2 lbs Acid
pH Down: Acid formulated using food grade Phosphoric acid. Just add a little at a time if your nutrient pH is too high in order to lower the pH to the proper level.
Price: $10.95
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Green Path Garden Supply 
