---
product_id: 6991006
title: "Seachem Ph Alert for Freshwater"
brand: "seachem"
price: "£9.76"
currency: GBP
in_stock: true
reviews_count: 13
category: "Seachem"
url: https://www.desertcart.co.uk/products/6991006-seachem-ph-alert-for-freshwater
store_origin: GB
region: United Kingdom
---

# Lasts 4x longer than competitors Continuous reversible color sensor Compact 1.5" x 2.5" size Seachem Ph Alert for Freshwater

**Brand:** seachem
**Price:** £9.76
**Availability:** ✅ In Stock

## Summary

> 🌊 Stay ahead of pH shifts—because your fish deserve the best!

## Quick Answers

- **What is this?** Seachem Ph Alert for Freshwater by seachem
- **How much does it cost?** £9.76 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/6991006-seachem-ph-alert-for-freshwater)

## Best For

- seachem enthusiasts

## Why This Product

- Trusted seachem brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Peace of Mind, 24/7:** Constant pH tracking to protect your aquatic ecosystem
- • **Ultra-Compact Design:** Small and clear, blends seamlessly with your aquarium aesthetic
- • **Effortless pH Monitoring:** No strips, no tests—just instant color alerts
- • **Long-Lasting Reliability:** Up to 4 times the lifespan of other pH sensors
- • **Freshwater Focused Precision:** Specifically engineered for freshwater environments

## Overview

Seachem Ph Alert for Freshwater is a compact, color-changing sensor that continuously monitors pH levels between 5.4 and 8.0 without the need for test strips. Designed for freshwater aquariums, it offers up to four times the lifespan of competing products, providing reliable, real-time alerts to help maintain a healthy aquatic environment.

## Description

pH Alert® is a unique color device designed to be placed in the aquarium or filter and monitor pH continuously. A sensor changes color reversibly to alert you shifts to in pH levels between 5.4 and 8.0. No tests, no strips, just constant readings. Freshwater Only.pH Alert® lasts up to 4 times as long as competing products. pH Alert® is also almost half the size of competing products (1.5" x 2.5"). It's small, clear, and unobtrusive, so it won't detract from the view of your aquarium.

Review: Amazing - Lost some fish and I couldn’t figure out why till I got this. To top it off I don’t have to test the water with strips all the time. A simple visible always on indicator is exactly what I needed
Review: Accurate to a point, easy to install, transparent housing. - This Ph monitor began working within 30m just as advertised. It's also congruent with my test strips, so I would trust it's accuracy, although it's no replacment for a master test kit with additives. Would buy again!

## Features

- Continuously monitors pH in freshwater
- Seachem sensor technology
- No tests, no strips
- Lasts up to 4 times as long as competing products

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000HHHDDS |
| ASIN  | B000HHHDDS |
| Allergen Information | Allergen-Free |
| Best Sellers Rank | #40,983 in Pet Supplies ( See Top 100 in Pet Supplies ) #57 in Aquarium Test Kits |
| Brand Name | Seachem |
| Customer Reviews | 4.2 4.2 out of 5 stars (273) |
| Date First Available  | October 15, 2006 |
| Global Trade Identification Number | 00000116002004 |
| Included Components | all |
| Is Discontinued By Manufacturer  | No |
| Item Form | Device |
| Item Type Name | Aquarium Accessory |
| Item Weight | 0.3 Ounces |
| Item model number  | 20 |
| Liquid Volume | 1 Kilograms |
| Manufacturer | Seachem Laboratories, Inc. |
| Manufacturer  | Seachem Laboratories, Inc. |
| Manufacturer Part Number | 67100200 |
| Model Number | 20 |
| Product Dimensions  | 0.34 x 3.31 x 0.33 inches; 0.3 ounces |
| Target Species | Fish |
| UPC | 000116002004 |
| Unit Count | 1 Count |

## Product Details

- **Brand:** Seachem
- **Item Form:** Device
- **Item Weight:** 0.3 Ounces
- **Liquid Volume:** 1 Kilograms
- **Manufacturer:** Seachem Laboratories, Inc.

## Images

![Seachem Ph Alert for Freshwater - Image 1](https://m.media-amazon.com/images/I/51b8WFixnwL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Amazing
*by P***I on June 26, 2023*

Lost some fish and I couldn’t figure out why till I got this. To top it off I don’t have to test the water with strips all the time. A simple visible always on indicator is exactly what I needed

### ⭐⭐⭐⭐⭐ Accurate to a point, easy to install, transparent housing.
*by S***C on May 4, 2024*

This Ph monitor began working within 30m just as advertised. It's also congruent with my test strips, so I would trust it's accuracy, although it's no replacment for a master test kit with additives. Would buy again!

### ⭐⭐⭐⭐⭐ Is accurate and works quickly
*by J***S on June 2, 2023*

I use this with an api test for ph and when adding ph within 5 minute the ph alert changes colors and matches exactly with perhaps a slight difference of at least .5 if at all but I trust Seachem products all the way as someone with every test kit and cares deeply about the quality of my aquarium.

## Frequently Bought Together

- Seachem Ph Alert for Freshwater
- Seachem Ammonia Alert

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*Product available on Desertcart United Kingdom*
*Store origin: GB*
*Last updated: 2026-05-16*