---
title: "Ph Monitor — $183K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/pet-supplies/ph-monitor"
last_updated: "2026-07-21T19:19:31.685Z"
locale: en
meta:
description: "Niche score 49/100 · $183K/yr market · 82K searches/yr · $17.94 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 49/100 · $183K/yr market · 82K searches/yr · $17.94 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Ph Monitor — $183K/yr Amazon US Niche (2026) - Flapen"
---
# **ph monitor**
**Skip it**
Brand-locked demand (top 5 brands take 96% of clicks) — this niche doesn't clear our bar today.
Market size 37Growth 22Conversion 95Competition 30Returns 97Price range 84Avg price 82Brand share 11Review moat 25Quality gap 58
**Returns**
**Incredible****0.6%**
return rate — above 6% kills the launch gate
**Conversion**
**Incredible****12.5%**
search→purchase rate — share of searches ending in a sale
**Price range**
**Great****$6.91–$66.66**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Avg price**
**Great****$17.94**
avg listing price — sweet spot $15–$100
**Quality gap**
**Good****4.4★**
avg incumbent rating — lower means beatable quality
**Market size**
**Okay****$183K**
$183K/yr · 82K searches
**Competition**
**Okay****67%**
top-5 click share — leaders hold, buyers still browse
**Review moat**
**Bad****4,289.21**
avg incumbent reviews — the moat a new listing must climb
**Growth**
**Bad****-6.0%**
90-day search growth — must beat 0% to launch
**Brand share**
**Bad****96%**
top-5 brand share — brand-locked demand
According to Flapen's Amazon United States niche tracking, ph monitor is a $183K/yr Amazon United States market (82K searches/yr). The top 5 brands hold 96% of demand. Verdict: Skip it — 49/100.
Data updated Jul 17, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **ph monitor market data**
- **Units sold / yr**
- **10K–13K**
- avg 500–750/product
- **Revenue / yr**
- **$179K–$224K**
- units × avg price
- **Launch success**
- **—**
- 0 of 0 new (360d)
- **Conversion rate**
- **12.5%**
- **Avg BSR**
- **#613**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **64%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **80 months**
- **Avg seller age**
- **164 days**
## **Competition & brand share**
The top 5 products take 67% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**7 **▼falling
**Sellers**
**64**
**Top-5 brand share**
**96%**
Top 20: 100%
**Top-5 click share**
**67%**
Top 20: 100%
**Open market**
**2%**
- API39% - Seachem33% - AAwipes15% - SJ WAVE5% - HOVIRAN4% - DIPSTIK3% - Open — no brand owns it (1 brand, 2%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -6.0% search growth over the last 90 days.
2K1KSpike '25Prime Day '25Spike '26 seasonSepDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 1.4×
[**Open Trend **](https://flapen.com/research/us/pet-supplies/ph-monitor/trend)
## **Top ph monitor search terms**
- **ammonia test kit**18K/yr+22.8%7.6% conv. - **api ammonia test kit**11K/yr+31.5%14.3% conv. - **seachem ammonia alert**13K/yr-7.9%11.4% conv. - **ammonia test kit for aquarium**11K/yr-9.0%8.7% conv. - **ammonia alert**7K/yr-30.0%10.0% conv. - **ammonia test**5K/yr-12.7%8.0% conv. - **aquarium ammonia test**7K/yr-47.4%10.3% conv. - **fish tank ammonia test**5K/yr-14.1%12.9% conv. - **seachem alert**3K/yr-14.3%5.9% conv. - **ammonia alert aquarium**3K/yr-41.4%11.8% conv. [**All search terms **](https://flapen.com/research/us/pet-supplies/ph-monitor/search-terms)
## **Top ph monitor products on Amazon**
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
0%10%$18K20%$37K30%$55K40%$73K1001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 14 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**API AMMONIA 130-Test Freshwater and Saltwater Aquarium Water Test Kit**API**$13.55**4.7★3,658 rev](https://www.amazon.com/dp/B0002566TC) [2**Seachem Ammonia Alert 1 Year Monitor (3 Pack)**Seachem**$22.83**4.4★913 rev](https://www.amazon.com/dp/B01HHA4ITY) [3**Seachem Ammonia Alert**Seachem**$8.55**4.2★3,953 rev](https://www.amazon.com/dp/B000255R5G) [4**AAwipes 8-in-1 Aquarium Test Kit for Fish Tanks - Quick & Accurate Water Testing Strips for Aquariums & Ponds. Tests pH Ammonia Alkalinity Hardness Chlorine etc. (K02-50)**AAwipes**$9.79**4.3★3,120 rev](https://www.amazon.com/dp/B0D2RG3LXR) [5**Seachem 28658 Alert Combo Pack white 6 x 3 x 4 inches**Seachem**$15.01**4.2★1,111 rev](https://www.amazon.com/dp/B01980RCWG)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Ammonia Test Strips for Fish Tank 50ct Ammonia Aquarium Test Strips**HOVIRAN**$8.51**1,118 rev1y ago](https://www.amazon.com/dp/B0F58BYY2X) [**DIPSTIK Ammonia Test Strips for Fish Tank Feshwater & Saltwater (50ct)**DIPSTIK**$7.84**978 rev1y ago](https://www.amazon.com/dp/B0F2HL2FQG) [**AAwipes Aquarium Ammonia Test Strips 8-in-1 |25 Strips | Quick & Accurate Water Testing Test pH Ammonia Alkalinity Hardness Chlorine Nitrite etc. (K02-25)**AAwipes**$6.91**724 rev1y ago](https://www.amazon.com/dp/B0DHGD4WB4) [**11 in 1 - Aquarium Test Strips | 950 Tests - 150 Strips | Fish Tank Aquariums Water Test Kit & ebook | Aquarium Thermometer | Fish Tank Water Testing Kit Includes 50 Ammonia Strips | Versatile Usage**SJ WAVE**$21.11**5,054 rev1y ago](https://www.amazon.com/dp/B0DBQW4J8D) [**AAwipes 8-in-1 Aquarium Test Kit for Fish Tanks - Quick & Accurate Water Testing Strips for Aquariums & Ponds. Tests pH Ammonia Alkalinity Hardness Chlorine etc. (K02-50)**AAwipes**$9.79**3,120 rev2y ago](https://www.amazon.com/dp/B0D2RG3LXR)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Seachem 28658 Alert Combo Pack white 6 x 3 x 4 inches**Seachem**$15.01**4.2★**▲ 46%**](https://www.amazon.com/dp/B01980RCWG) [**AAwipes Aquarium Ammonia Test Strips 8-in-1 |25 Strips | Quick & Accurate Water Testing Test pH Ammonia Alkalinity Hardness Chlorine Nitrite etc. (K02-25)**AAwipes**$6.91**4.4★**▲ 42%**](https://www.amazon.com/dp/B0DHGD4WB4) [**AAwipes Aquarium Ammonia Test Strips 8-in-1 |100 Strips | Quick & Accurate Water Testing for Freshwater & Saltwater Tanks -Test pH Sodium Chloride Alkalinity Hardness Chlorine etc. (K02-100)**AAwipes**$11.67**4.3★**▲ 41%**](https://www.amazon.com/dp/B0D2RCL6ZS) [**Ammonia Test Strips for Fish Tank 50ct Ammonia Aquarium Test Strips**HOVIRAN**$8.51**4.5★**▲ 34%**](https://www.amazon.com/dp/B0F58BYY2X) [**DIPSTIK Ammonia Test Strips for Fish Tank Feshwater & Saltwater (50ct)**DIPSTIK**$7.84**4.5★**▲ 27%**](https://www.amazon.com/dp/B0F2HL2FQG)
**~~View all trending →~~**
## **What buyers say about ph monitor**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Ease Of Use**38%
*“Easy to read”*
**Value For Money**13%
*“Good value for money”*
**Quality-Overall**12%
*“Good kit”*
**Advertised Vs Actual Product**9%
*“Works as advertised”*
**Instructions/User Manual/Troubleshooting**4%
*“Easy to understand the instructions”*
**Efficiency**3%
*“Works perfectly”*
**Water Resistance**3%
*“Water testing made easy”*
**Durability**2%
*“The case is durable”*
**Ease Of Cleaning**2%
*“They can dirty the water pretty quickly”*
**Color**1%
*“The colors are fairly easy to read”*
### **What buyers complain about **
**Functionality-Overall**15%
*“Ammonia card didnt work”*
**Color**14%
*“color gradations difficult”*
**Smell**10%
*“Smells absolutely disgusting”*
**Value For Money**8%
*“So, the value isn't there as expected”*
**Ease Of Use**6%
*“Overpriced and almost impossible to use sometimes”*
**Quality-Overall**6%
*“The test tubes that come with the kit are of very poor quality”*
**Durability**5%
*“break off after a few uses”*
**Advertised Vs Actual Product**4%
*“False advertisement”*
**Leak-Proof**4%
*“Arrived leaking”*
**Water Resistance**3%
*“Water issues”*
### **Top return reasons **
**Functionality-Overall**33%
**Advertised Vs Actual Product**20%
**Value For Money**9%
**Defective Material/Parts**8%
**Color**7%
**Product Condition**4%
**Certifications**4%
**Smell**3%
**Size-Overall**2%
**Instructions/User Manual/Troubleshooting**2%
## **Common questions**
- **Is ph monitor profitable to sell on Amazon United States?**
- The niche generates $183K/yr across 14 tracked products. 90-day search growth is -6.0%. Flapen's verdict: Skip it (49/100).
- **How competitive is the ph monitor niche?**
- 7 brands and 64 sellers compete. The top 5 products take 67% of clicks and top 5 brands hold 96% of demand.
- **What do buyers complain about in ph monitor?**
- Top complaints mined from reviews: Functionality-Overall, Color, Smell. The return rate is 0.6%.
- **When does demand for ph monitor peak?**
- Demand is steady year-round — the busiest month runs 1.4× the quietest.
- **What does it cost to enter the ph monitor niche?**
- Listings span $6.91–$66.66; the average listing price is $17.94 (sweet spot $15–$100). The average incumbent carries 4,289 reviews — the moat a new listing must climb.
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