ph monitor
Skip itBrand-locked demand (top 5 brands take 96% of clicks) — this niche doesn't clear our bar today.
Returns
Incredible0.6%return rate — above 6% kills the launch gate
Conversion
Incredible12.5%search→purchase rate — share of searches ending in a sale
Price range
Great$6.91–$66.66cheapest to priciest tracked listing — scored on the share inside $15–$100
Avg price
Great$17.94avg listing price — sweet spot $15–$100
Quality gap
Good4.4★avg incumbent rating — lower means beatable quality
Market size
Okay$183K$183K/yr · 82K searches
Competition
Okay67%top-5 click share — leaders hold, buyers still browse
Review moat
Bad4,289.21avg incumbent reviews — the moat a new listing must climb
Growth
Bad-6.0%90-day search growth — must beat 0% to launch
Brand share
Bad96%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
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.No pronounced peak months · busiest ÷ quietest = 1.4×
Top ph monitor search terms
- ammonia test kit18K/yr
- api ammonia test kit11K/yr
- seachem ammonia alert13K/yr
- ammonia test kit for aquarium11K/yr
- ammonia alert7K/yr
- ammonia test5K/yr
- aquarium ammonia test7K/yr
- fish tank ammonia test5K/yr
- seachem alert3K/yr
- ammonia alert aquarium3K/yr
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.
All 14 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
API AMMONIA 130-Test Freshwater and Saltwater Aquarium Water Test Kit
API$13.554.7★3,658 rev
Seachem Ammonia Alert 1 Year Monitor (3 Pack)
Seachem$22.834.4★913 rev
Seachem Ammonia Alert
Seachem$8.554.2★3,953 rev
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$9.794.3★3,120 rev
Seachem 28658 Alert Combo Pack white 6 x 3 x 4 inches
Seachem$15.014.2★1,111 rev
Newest
by launch date
Ammonia Test Strips for Fish Tank 50ct Ammonia Aquarium Test Strips
HOVIRAN$8.511,118 rev
DIPSTIK Ammonia Test Strips for Fish Tank Feshwater & Saltwater (50ct)
DIPSTIK$7.84978 rev
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$6.91724 rev
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$21.115,054 rev
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$9.793,120 rev
Trending
90-day click momentumSeachem 28658 Alert Combo Pack white 6 x 3 x 4 inches
Seachem$15.014.2★
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$6.914.4★
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$11.674.3★
Ammonia Test Strips for Fish Tank 50ct Ammonia Aquarium Test Strips
HOVIRAN$8.514.5★
DIPSTIK Ammonia Test Strips for Fish Tank Feshwater & Saltwater (50ct)
DIPSTIK$7.844.5★
What buyers say about ph monitor
What buyers praise and complain about, mined from review topics.What buyers love
“Easy to read”
“Good value for money”
“Good kit”
“Works as advertised”
“Easy to understand the instructions”
“Works perfectly”
“Water testing made easy”
“The case is durable”
“They can dirty the water pretty quickly”
“The colors are fairly easy to read”
What buyers complain about
“Ammonia card didnt work”
“color gradations difficult”
“Smells absolutely disgusting”
“So, the value isn't there as expected”
“Overpriced and almost impossible to use sometimes”
“The test tubes that come with the kit are of very poor quality”
“break off after a few uses”
“False advertisement”
“Arrived leaking”
“Water issues”
Top return reasons
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.