Top 10 Best pH Controllers
for September 2022

MOOZ's editors select recommendations independently. Purchases made through our links may earn us commissions.

pH is a measure of acidity and alkalinity in a solution that measures between 0-14. Levels less than 7 are considered acidic, and levels above 7 are considered alkaline. The pH of your pool, aquarium, pond, hot tub, or spa, if properly balanced, will provide for clear and clean water, but overacidity or alkalinity can cause algae blooms, cloudy water, and other problems.

pH controllers can be pricey, but they are essential for keeping your pH balanced, especially in the spring and summer when temperatures are really hot and the water tends to get warm. The good news is that you don't need to buy a new pH controller every year, and that a good, used one will run you less than $100.

Our pH controller reviewer, Scott, has been testing pH controllers for performance, ease of use and price. He evaluated performance factors like how quickly it balanced pH, whether it provided enough buffer, and how easy it is to use. He also looked at ease of use, which includes how easy it is to set up and use. Finally, he took into consideration price, which is an important consideration for most people.

Here are our picks for top pH controllers:

1
9.9
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Digital 2 in 1 pH ORP Redox Controller Monitor with Electrode Probe BNC Water Quality Meter Output Power Relay Control & Online Continuous Measurement Kit for Aquarium Hydroponics

TEKCOPLUS Digital 2 in 1 pH ORP Redox Controller Monitor with Electrode Probe BNC Water Quality Meter Output Power Relay Control & Online Continuous Measurement Kit for Aquarium Hydroponics

by TekcoPlus Ltd
What We like

COMES WITH : 4.003 + 1 x 6.864 + 1 x 9.182 calibration (buffer) solution

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Product Features

  • REPLACEABLE ELECTRODE : with 300cm long cableWith 2 probes (pH and redox) environmentally friendly choice.
  • 2 IN 1 CONTROLLER MONITOR: Display shows pH value at 0.00 to 14.00pH and orp value at -1999 to 1999mV simultaneously.
  • APPLICATIONS & USAGE : Fish hatchery, wine production, swimming pool (bath), laboratories, water conditioning, schools & colleges, floristics, for analysis of fluids (ph-value), ponds, various industrial
  • LARGE LCD DISPLAY : 4 LED , Dual Display Reading
2
9.6
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America Marine Inc. Pinpoint pH Controller Interface 120VAC

America Marine Inc. Pinpoint pH Controller Interface 120VAC

by American Marine Inc.
What We like

Adjusting Screwdriver

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Product Features

  • Pre-Mixed High Precision Calibration Fluids
  • Includes PINPOINT pH Probe with 10 foot cable and Probe Storage Bottle
3
9.2
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Milwaukee Instruments MC122US pH Controller with Hi/Low Range Alarm, 2 Point Manual Calibration, 0.0 to 14.0 pH Range

Milwaukee Instruments MC122US pH Controller with Hi/Low Range Alarm

by Milwaukee Instruments, Inc
What We like

Power plug for CO2 dosing

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Product Features

  • Supplied with 12 VDC adapter and mounting kit
  • Manual 2 points calibration
  • User selectable Hi/Low Set Point
  • Visual LED alarm
4
9.1
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2 in 1 Digital pH and ORP Controller with Separate Relays Repleaceable Electrode BNC Type Probe Water Quality Tester for Aquarium Hydroponics Tank Monitor 14.00pH / 1999mV Calibration Solution

Gain Express 2 in 1 Digital pH and ORP Controller with Separate Relays Repleaceable Electrode BNC Type Probe Water Quality Tester for Aquarium Hydroponics Tank Monitor 14.00pH

by Gain Express Holdings Ltd
What We like

FEATURES:Protection Dead Band -controller automatically turned-off or shut down to protect your unit from erroneous readings

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Product Features

  • APPLICATION:Aquacultures, beverage, fish hatcheries, water ponds, whirlpool,quality control, water conditioning, Hydroponics,food processing,clean or wastewater control, plating inductry etc.
  • MEASUREMENT RANGE:pH 0.00~14.00pH (0.1% +0.02pH accuracy) / ORP -1999~1999mV (5mV accuracy)
  • DISPLAY: Dual 4 LED display reading with outout in action LED indicator
  • ELECTRODE: Detachable and replaceable BNC type pH and ORP probe
5
8.8
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Milwaukee MC125 pH/ORP Controller with Mounting Kit, 0.00 to 14.00 pH, +/-0.2 pH Accuracy

Milwaukee MC125 pH/ORP Controller with Mounting Kit

by Milwaukee Instruments
What We like

Professional output

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Product Features

  • Laboratory tested
6
8.8
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American Marine PINPOINT pH Controller

Pinpoint Monitors American Marine PINPOINT pH Controller

by Pinpoint Monitors
What We like

The PINPOINT pH Controller? is perfect for the freshwater planted aquarium keeper as well as the ser

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Product Features

  • Replacement pH probe
  • Will control pH in both a downward and upward direction. The user will select his or her own setpoin
  • 110 VAC operation.
  • Additional calibration flui
7
8.8
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Pogongshi Newest PH-803W 2-in-1 PH ORP Redox Controller Wifi Output Power Relay Monitor Water Quality Tester For Laboratories Analysis Aquarium Hydroponics

Pogongshi Newest PH-803W 2-in-1 PH ORP Redox Controller Wifi Output Power Relay Monitor Water Quality Tester For Laboratories Analysis Aquarium Hydroponics

by Pogongshi
What We like

This 2-in-1 WIFI pH & ORP controller and monitor simultaneously measures and displays both pH value and redox value (ORP). It comes with 2 BNC electrodes (pH and redox) and 2 output power sockets. Both electrodes are detachable, they can be replaced easily at any time.

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Product Features

  • Fish hatchery, wine production, swimming pool (bath), laboratories, water conditioning, schools & colleges, floristics, for analysis of fluids (ph-value), ponds, various industrial application, Pisciculture, Koi, Kois, Boilere, Pond, Pool, Spa, swimming pools, pool, analysis of liquids, orchids breed, breeder, hemp, grow, etc.
  • Simply set the desired Hi/ Low pH/redox values in the controller. It will turn on your device if the currently measured pH or Redox value is lower than your set value, and it will turn off your device if the measured value is higher than your set value.
  • The suitable way for you to keep an eye on the different water parameters in your tank! A MUST to have a perfect way to automate & regulate the control devices in your aquarium to ELIMINATES FATALITY and MAINTAIN a HEALTHY WATER SYSTEM!
  • As for the relay output power sockets, you can plug in your own 110V/ 220V device to it, e.g. air outlet stone, O3 ozoniser, oxygen pump, CO2-regulator, electromagnetic v-alve and other ORP & pH control devices.
8
8.8
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Jenco 3676 pH/ORP Trasmmiter/Controller, LED Display pH/Mv/ORP, 4-20 mA Output, 1/4-Din Panel Mount

Jenco 3676 pH/ORP Trasmmiter/Controller

by Jenco
What We like

pH or ORP monitor, influent/effluent control, adjustable, reversible transmitter, 2 relays and BNC.

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9
8.6
SCORE
Milwaukee Instruments MC720 pH Controller with Mp810 Dosing Pump, 0 Degree C to 50 Degree C Temperature Range, 0.1 pH Resolution

Milwaukee Instruments MC720 pH Controller with Mp810 Dosing Pump

by Milwaukee Instruments
What We like

Control the pH of your tank/reservoir AUTOMATICALLY

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Product Features

  • Output active when measurement is higher or lower than selected set point
  • Alarm active when reading is higher or lower than set point
10
8.2
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Digital pH ORP Redox 2 in 1 Controller Monitor w/Output Power Relay Control, Electrode Probe BNC, Water Quality Meter Online Continuous Measurement Kit, for Aquarium Hydroponics Plant Pool Spa

Gain Express Digital pH ORP Redox 2 in 1 Controller Monitor w/Output Power Relay Control

by Gain Express Holdings Ltd.
What We like

WIDE APPLICATIONS- Ideal for anywhere that requires water quality monitoring, e.g. Aquariums, Hydroponics, Swimming Pools, Spa, Fish Tanks, Ponds, Laboratories, Plants, Garden, etc.

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Product Features

  • DETACHABLE ELECTRODE- Both pH & ORP Electrodes can be detached from the main unit andcome with 300cm long cable and BNC connector. In case of wearing and tearing after a period of time, you can just change the electrodes instead of the whole unit. A more economical and environmentally friendly choice.
  • CONSTANT MEASUREMENT- Powered by AC Power, ideal for long-term water quality monitoring and controlling.
  • WITH RELAY FOR OUTPUT POWER CONTROL- Plug in your own device (e.g. oxygen pump, CO2-regulator,O3 ozonizer or other pH & ORPgeneration devices) into the corresponding PH or ORP output power socket, you can set yourdesired ph or orp value in this monitor controller to trigger your devices to turn on or off.
  • INSTANT MEASUREMENT- Dual measurementdisplay shows pH value at 0.00 to 14.00pH and orp value at-1999 to 1999mV simultaneously. No need to press any button to change the measurement you wanted to observe.

pH Controllers - Keeping Your Aquarium Healthy and Safe

The pH controller is a device that helps to keep the pH level of the aquarium at a fixed level. The pH level will be maintained at an optimum level within a specified range of pH. As our aquariums contain many aquatic creatures, keeping them healthy is very important. When an aquarium contains harmful impurities, the pH will be affected. This will affect the aquatic creatures living in the aquarium, especially the fishes. Thus, we must take proper care of the pH levels in our aquariums to keep them healthy and safe. The pH controller helps to maintain the pH level of the aquarium at an optimum level. These devices are suitable mainly for beginners. They are simple and easy to use. These devices come with different features and specifications, so one must carefully select the one that best suits the needs and requirements of the aquarium.

What are pH controllers and how do they work

pH controllers work by regulating the pH level of the pool and adjusting it as needed. The pH of your pool will fluctuate throughout the day, especially in the warmer months. During a hot day, the pH of your pool will rise due to the addition of evaporating water, making your pool too alkaline. A pH controller is used to prevent this from occurring. Before investing in a pH controller, you should test the pH level of your pool, and record the result. You can then consider investing in a pH controller from one of the top manufacturers, such as Hayward. These controllers adjust the pH of your pool to keep it at the perfect level at all times, preventing it from going up or down to high or low. There are different kinds of pH controllers, but the most popular is the pH sensor, which records the pH level of your pool and sends this information to the controller. The controller then adjusts the pH level of your pool based on the information it receives.

The difference between pH controllers and pH meters

pH meters and pH controllers are both used to measure the pH levels of a body of water. However, even though they are both used to measure the pH levels of water, they use different methods to do so. pH meters measure the pH levels of water by sending a light beam across a water sample. The light is absorbed by the different atoms in the water. If the water sample has a lower pH level, the light is absorbed by the oxygen molecule, which absorbs most light wavelengths. If the water sample has a higher pH level, the light is absorbed by the hydrogen molecule, which absorbs most light wavelengths. A sensor then detects how much light is absorbed by each molecule, which it then converts to a digital signal. Most pH meters have electrodes that are attached to the ends of the sensor, which measure the pH levels of a sample and send the data to the meter. The meter will then read the data and then display the pH level on the display. Some meters also display other data, such as temperature, salinity, conductivity, carbonate hardness, total dissolved solids, and more. Most meters do not come with probes needed to take measurements. pH controllers are different from pH meters, as they connect to a power source, such as your outlet or batteries. They usually use a microcontroller to read data from the pH meter. The controller then sends the power to a solenoid valve, which regulates the flow of electricity into a wire. The wire then connects to the electrodes of the pH meter. By turning on the solenoid valve, the electricity in the wire is sent through the electrodes, which increases the pH level. The controller will then send a signal to the solenoid valve to turn off the flow of electricity, which decreases the pH level.

Best pH controllers on the market, based on customer satisfaction, durability, price, and other factors

Find which pH controllers have received the highest customer ratings and satisfactions, based on various factors, such as price, durability, reliability, and features. Brand: You don\'t necessarily want to make sure that the brand of pH controller you choose is the brand you currently use or have used in the past. You want a brand name you understand and are familiar with. This will ensure that you won\'t run into trouble trying to figure out which settings to use or how to use the system.

How to choose the right pH controller for your individual needs

pH controllers allow plants to grow at just the right pH level, so they control the amount of acid or alkaline that is added to the soil.\\r\\n\\r\\nFor certain plants, it is essential to maintain the proper pH of their roots, which are succulent and absorb fluids through their outer skins. If the pH drops too low, the roots die and the plant dies as well. If the pH is too high, the water may become too acidic for the plant to absorb.\\r\\n\\r\\nIn order to prevent over or under-fertilization of plants, gardeners use pH controllers to maintain the optimal pH levels in the plant\\\'s water. Professionals recommend, however, that a hobbyist should only buy a pH controller if their plants require constant pH control.

Conclusion

In this post, we\'ve discussed the different types of pH controllers and the features and specifications you should look for. I hope this post has helped you learn more about pH controllers. If you have any questions, please comment below.

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