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Hanna GroLine
"Couldn't be happier with my new GroLine meter. I replaced a couple of pH meters that I've used for years with Hanna 9814's. They are easy to use and very well built. If you haven't tried this line out, you are missing out."
- Derek H., Verified Buyer
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GroLine is great
"Your new instrument built for hydroponic feeding is wonderful. Easy to use and extremely accurate."
- David C., Verified Buyer
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5 stars for sure
"I've used other brands and nothing compares to the quality and usability, it's easy. I love the fact that you can replace the probe if it goes bad. Hands-down have my business from here on out!! My only complaint is that I should have tried this pH meter sooner! It displays pH, ppm or EC, and water temperature all-in-one screen. 📺 I love how the probe has an extension, so you don't have your head down in a bucket trying to read the pH lol 😂" - Nick S., Verified Buyer
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GroLine Monitor
"After spending 25 years operating water pollution control facilities, I already knew that Hanna was an industry leader. You can understand how pleased I was when I learned that Hanna produced a laboratory quality instrument for my home hydroponics system, that was as accurate as any laboratory pH meter. The Hanna GroLine Monitor is the perfect addition to any hydroponic system. With 1 probe to continuously monitor pH and TDS and with prepackaged calibration standards, it's extremely easy to calibrate and use. Hanna is a U.S. company. The GroLine Monitor is the perfect instrument for my needs." - Micheal C., Verified Buyer
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A must for the serious grower
"Tester works great and has been a game changer for my fertilizing schedule." - Paul B., Verified Buyer
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Easy to use and accurate
"If you are looking for an EC/TDS tester, this is a nice one to own. I am a fan of keeping things simple. I like having separate testers rather than having a combo unit. This one meets my needs."
- Tollie H., Verified Buyer
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Set it - no worries
"Pretty happy with my purchase. A really good feature is the low level alarm. I use a programmable relay to activate the alarm. Helps me from overshooting on my smaller reservoir. Got it dialed in."
- Joel K., Verified Buyer
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Best portable meter period
"I have been using the HI9814 daily for about a year now. I will never go back! The precision and ease of use, PLUS, being able to pick up the phone and talk to a Hanna Tech rep has always been extremely helpful and easy! Hanna4Life"
- Justin S., Verified Buyer
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Consistently great quality
"All the containers and sachets we bought showed up in great condition! Other companies' boxes show up damaged or with dried out sachets. I can always rely on GroLine to have consistently great quality when I purchase through them."
- Idris M., Verified Buyer
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GroLine Electrode Storage Solution (120 mL)
"Hanna Hydro GroLine is the best on the market. Their storage solution, I would never go without!"
- Chantel P., Verified Buyer
Meet the meter that does it all
GroLine pH/EC/TDS Meter
Keep plants safe 24/7
GroLine Hydroponic Monitor
Become a Hanna GroLine
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