What do you use to clean electrode?

Instructions say to use distilled water to clean electrodes

Would this be a good tool for an aquarium?

Sure it will read the Ph for your tank

Does it work well for testing ph in a saltwater pool?

I don’t know anything about testing pool water but it will definitely give you the ph between 4.0-10

My pen has gone way out of calibration. Is there a way to calibrate it against an accurate test kit? I.e. just set the pH?

I second the answer but Alix. I thought it could be recalibrated against the standards they provide and I would be back to using the ph tool. Once it started to give me bogus readings I knew I had a new paper weight. I even bought 7.0 fluid so I could check it before each use so I knew the readings were correct. I have extensive experience calibrating thousands of gauges in a railroad machine shop to NIST and audited by the ARR annually. Knowing I have a good accurate tool is important to me. The quality of this tool is below the mark. I am surprised as I own VIVOSUN products that are more reliable so I thought I would give it a chance. It lasted almost a year for me.

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VIVOSUN Digital pH Meter, 0.01pH High Accuracy Pen Type pH Tester for Hydroponics, Household Drinking, Pool and Aquarium, UL Certified

VIVOSUN Digital pH Meter, 0.01pH High Accuracy Pen Type pH Tester for Hydroponics, Household Drinking, Pool and Aquarium, UL Certified

Product ID: 333016960

Details

Brand
VIVOSUN
Manufacturer
VIVOSUN
Recommended uses for product
water pool
UPC
714119465581
pH range
0.00-14.00

📏0.01 pH precision

🔋Built-in batteries included

🌡️Automatic Temperature Compensation

Details

Brand
VIVOSUN
Manufacturer
VIVOSUN
Recommended uses for product
water pool

Description

🌊 Stay ahead of the curve with precision pH insights!

SLEEK PORTABLE - Compact, lightweight design with backlit LCD for easy use anytime, anywhere
READY WHEN YOU ARE - Comes with pre-installed batteries and calibration powders—no delays, just results
SMART TEMPERATURE ADJUSTMENT - ATC technology ensures instant, temperature-corrected pH values
PINPOINT ACCURACY EVERY TIME - Ultra-sensitive 0.01 pH resolution for flawless readings
VERSATILE FOR EVERY ENVIRONMENT - Perfect for hydroponics, pools, aquariums, labs, and your daily water quality checks

The VIVOSUN Digital pH Meter delivers lab-grade accuracy with 0.01 pH resolution and automatic temperature compensation, packaged in a sleek, pocket-sized design. Ideal for professionals managing hydroponics, aquaculture, pools, and household water quality, it includes everything needed for immediate use—batteries, calibration powders, and a clear backlit display—making precise pH monitoring effortless and reliable.

Specifications

Asin	B01M5IASHD
Best Sellers Rank	66,241 in Business, Industry & Science (See Top 100 in Business, Industry & Science) 87 in Lab pH Meters
Brand	VIVOSUN
Customer Reviews	3.8 3.8 out of 5 stars (8,333) 3.8 out of 5 stars
Included Components	Batteries included
Manufacturer	VIVOSUN
Manufacturer Part Number	4316344538
Material Type	ABS
Model Number	4316344538
Number Of Items	1
Recommended Uses For Product	water, pool, spas, liquid food, laboratory, aquaculture, hydroponics
Sterility Rating	0.00-14.00
Unit Count	1.0 count
Upc	714119465581

Reviews

User

Ok product

Works well

6.10.2025

User

Excellent

Very good piece of kit, excellent delivery.

12.06.2026

User

Good but not enough buffers

Does what it's meant to do BUT they should include MORE than one set of buffers.

19.06.2026

User

Pas cher mais très lent

La calibration est simple. Par contre, par rapport à une sonde témoin, il est extrêmement lent. Il faut compter presque 10 minutes pour que le pH final soit affiché. Il faut donc le mettre longtemps pour à avoir le bon pH. Après 6 mois et une utilisation par mois, il deconne complètement. Mauvaise qualité

15.11.2024

User

pH-Tester

Macht seine Aufgabe gut.

8.08.2026

User

Corroded/rusty battery

Arrived not working, tried replacing the battery but no joy so sourced an alternative

11.10.2021

User

nice

calibration is hard but when it's done it's good

23.07.2026

User

Functionality

Works great but do not like that have to calibrate it

30.07.2026

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