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.

Vivosun Digital Ph Meter For Water 0 01ph High Accuracy

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Description

💧 Stay ahead of the curve with precision pH insights in your pocket!

COMPACT READY TO GO - Pocket-sized, lightweight design with batteries included—perfect for on-the-move testing in any environment.
VERSATILE FOR EVERY SETTING - Ideal for hydroponics, aquariums, pools, labs, and household water—be the expert in any water quality scenario.
SMART TEMPERATURE ADJUSTMENT - ATC technology instantly calibrates readings to water temperature, eliminating guesswork and boosting reliability.
PRECISION THAT PROFESSIONALS TRUST - Measures pH from 0.00 to 14.00 with razor-sharp 0.01 accuracy for flawless results every time.
EFFORTLESS CALIBRATION READABILITY - Advanced tech ensures fast, accurate calibration with a bright backlit LCD for clear readings day or night.

The VIVOSUN Digital pH Meter Pen delivers laboratory-grade accuracy (0.01 pH resolution) with automatic temperature compensation and a backlit LCD, making it the ultimate compact tool for hydroponics, aquariums, pools, and household water testing. Lightweight and ready to use out of the box, it empowers professionals and enthusiasts alike to monitor water quality with confidence and ease.

Specifications

ASIN	B01M5IASHD
Brand	VIVOSUN
Brand Name	VIVOSUN
Customer Reviews	3.8 out of 5 stars 8,359 Reviews
Included Components	Batteries included
Item Weight	0.11 Kilograms
Manufacturer	VIVOSUN
Material Type	ABS
Model Number	4316344538
Number of Items	1
Part Number	4316344538
Recommended Uses For Product	Aquarium, ph Test, Spa, Swimming Pool, Home Water, Hot Tub, Tap Water, Well Water, Water Test, pH Test, Aquaculture, Hydroponics, Liquid Food, Laboratory
Recommended uses for product	Aquarium, ph Test, Spa, Swimming Pool, Home Water, Hot Tub, Tap Water, Well Water, Water Test, pH Test, Aquaculture, Hydroponics, Liquid Food, Laboratory Recommended uses for product Aquarium, ph Test, Spa, Swimming Pool, Home Water, Hot Tub, Tap Water, Well Water, Water Test, pH Test, Aquaculture, Hydroponics, Liquid Food, Laboratory See more
Sterility Rating	0.00-14.00
UPC	714119465581
Unit Count	1 Count
Unit count	1 Count
pH range	0.00-14.00

Reviews

A**O

Units doesn’t fit for my expectation

Units doesn’t fit for my expectation . It not even allow me to on . I changed the battery but still the same

11.06.2023

J**Z

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

F**T

pH-Tester

Macht seine Aufgabe gut.

8.08.2026

D**N

Corroded/rusty battery

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

11.10.2021

S**D

nice

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

23.07.2026

A**R

Functionality

Works great but do not like that have to calibrate it

30.07.2026

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€ 24.84

Duties & taxes included

In stock

Sold byAmazon PortugalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Portugal.

Secure transaction

ProDesertcart PRO

Fast, free shipping, member pricing & priority support.

Join PRO →

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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