Is aquarium ph test kit profitable to sell on Amazon United States?

The niche generates $134K/yr across 20 tracked products. 90-day search growth is -22.4%. Flapen's verdict: Skip it (45/100).

How competitive is the aquarium ph test kit niche?

9 brands and 37 sellers compete. The top 5 products take 60% of clicks and top 5 brands hold 93% of demand.

What do buyers complain about in aquarium ph test kit?

Top complaints mined from reviews: Functionality-Overall, Value For Money, Quality-Overall. The return rate is 0.6%.

When does demand for aquarium ph test kit peak?

Demand peaks in Apr; the busiest month runs 1.8× the quietest.

What does it cost to enter the aquarium ph test kit niche?

Listings span $3.82–$32.18; the average listing price is $12.74 (sweet spot $15–$100). The average incumbent carries 3,587 reviews — the moat a new listing must climb.

aquarium ph test kit

Skip it

Soft demand (-22.4% this quarter) — this niche doesn't clear our bar today.

Conversion

Incredible14.5%

search→purchase rate — share of searches ending in a sale

Returns

Incredible0.6%

return rate — above 6% kills the launch gate

Price range

Good$3.82–$32.18

cheapest to priciest tracked listing — scored on the share inside $15–$100

Avg price

Good$12.74

avg listing price — sweet spot $15–$100

Quality gap

Okay4.5★

avg incumbent rating — lower means beatable quality

Competition

Okay60%

top-5 click share — leaders hold, buyers still browse

Market size

Okay$134K

$134K/yr · 72K searches

Review moat

Okay3,586.85

avg incumbent reviews — the moat a new listing must climb

Brand share

Bad93%

top-5 brand share — brand-locked demand

Growth

Bad-22.4%

90-day search growth — must beat 0% to launch

According to Flapen's Amazon United States niche tracking, aquarium ph test kit is a $134K/yr Amazon United States market (72K searches/yr). The top 5 brands hold 93% of demand. Demand peaks in Apr. Verdict: Skip it — 45/100.

Data updated Jul 17, 2026 · scored weekly · How we score niches

aquarium ph test kit market data

Units sold / yr: 10K–13K; avg 250–500/product
Revenue / yr: $127K–$159K; units × avg price
Launch success: —; 0 of 0 new (360d)
Conversion rate: 14.5%
Avg BSR: #103
Page quality: 0%
Prime: 100%
Sponsored: 55%
Out of stock: 0.0%
Avg brand age: 71 months
Avg seller age: 160 days

Competition & brand share

The top 5 products take 60% of clicks — established leaders, but buyers still shop beyond them.

Brands

9 falling

Sellers

Top-5 brand share

93%

Top 20: 100%

Top-5 click share

60%

Top 20: 100%

Open market

API59%
AAwipes15%
Tetra11%
Seachem4%
SJ WAVE3%
Kordon3%
Open — no brand owns it (3 brands, 4%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -22.4% search growth over the last 90 days.

Peak months: Apr · busiest ÷ quietest = 1.8×

Open Trend

Top aquarium ph test kit search terms

aquarium ph test kit12K/yr -18.5%7.5% conv.
ph down aquarium15K/yr -30.6%16.1% conv.
fish tank ph test kit9K/yr -15.9%10.8% conv.
aquarium ph balancer8K/yr -26.0%11.7% conv.
api ph down7K/yr -8.4%18.8% conv.
fish tank ph balancer6K/yr -23.7%14.0% conv.
aquarium ph down4K/yr -18.7%14.4% conv.
ph balance for fish tank4K/yr -15.1%14.6% conv.
aquarium ph3K/yr -27.6%9.3% conv.
ph test kit for aquarium water3K/yr -54.0%10.0% conv.

All search terms

Top aquarium ph test kit 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.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 20 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

API pH DOWN Freshwater Aquarium Water pH Reducing Solution 4-Ounce Bottle

API$5.754.6★3,002 rev

API Aquarium Pharmaceuticals 30B pH Down Aquarium pH Adjuster 16 oz Model Number: 17163020301 Hook

API$15.624.6★3,002 rev

API PROPER pH 7.0 Freshwater Aquarium Water pH Stabilizer 8.8-Ounce Container

API$10.994.5★2,829 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

Tetra Correct pH Tablets 8 Count For aquarium Water

Tetra$3.824.5★3,723 rev

Newest

by launch date

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

1y ago

SJ WAVE$21.115,054 rev

1y ago

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

2y ago

FOLLOWIN pH Up and Down Control Kit for Hydroponics Soil Gardens & Aquariums - Concentrated Liquid pH Adjuster Set (9 oz + 9 oz) with pH Indicator - Balanced Nutrient Solution for Plants

FOLLOWIN$20.34722 rev

5y ago

Aquarium Test Strips for Freshwater Fish: 7 in 1 Fish Tank Water Testing Kit for Aquarium Pond - Accurate Testing Nitrate Nitrite Hardness Free Chlorine pH Carbonate Total Alkalinity-100 Strips

FUNSWTM$12.822,539 rev

5y ago

What buyers say about aquarium ph test kit

What buyers praise and complain about, mined from review topics.

What buyers love

Ease Of Use38%

“Easy to read”

Value For Money14%

“Good value for money”

Advertised Vs Actual Product11%

“Works as advertised”

Quality-Overall11%

“Good kit”

Instructions/User Manual/Troubleshooting3%

“Lots of tests; good instructions,”

Water Resistance3%

“Water testing made easy”

Efficiency3%

“works great”

Durability2%

“The case is durable”

Plant Growth2%

“Work great for my hydroponic garden comes with everything you need”

Adjustability/Rotatability/Reclining1%

“I can adjust to get it down to 6.5 with no problem”

What buyers complain about

Functionality-Overall17%

“Ineffective”

Value For Money8%

“Not worth it”

Quality-Overall7%

“The test tubes that come with the kit are of very poor quality”

Durability7%

“break off after a few uses”

Color7%

“color gradations difficult”

Ease Of Use6%

“Overpriced and almost impossible to use sometimes”

Advertised Vs Actual Product5%

“False advertisement”

Leak-Proof5%

“Arrived leaking”

Smell5%

“Strong chemical smell”

Instructions/User Manual/Troubleshooting5%

“This comes with ineffective instructions”

Top return reasons

Functionality-Overall32%

Advertised Vs Actual Product21%

Value For Money10%

Defective Material/Parts6%

Color5%

Leak-Proof5%

Product Condition4%

Size-Overall3%

Certifications3%

Instructions/User Manual/Troubleshooting2%

Common questions

Is aquarium ph test kit profitable to sell on Amazon United States?: The niche generates $134K/yr across 20 tracked products. 90-day search growth is -22.4%. Flapen's verdict: Skip it (45/100).
How competitive is the aquarium ph test kit niche?: 9 brands and 37 sellers compete. The top 5 products take 60% of clicks and top 5 brands hold 93% of demand.
What do buyers complain about in aquarium ph test kit?: Top complaints mined from reviews: Functionality-Overall, Value For Money, Quality-Overall. The return rate is 0.6%.
When does demand for aquarium ph test kit peak?: Demand peaks in Apr; the busiest month runs 1.8× the quietest.
What does it cost to enter the aquarium ph test kit niche?: Listings span $3.82–$32.18; the average listing price is $12.74 (sweet spot $15–$100). The average incumbent carries 3,587 reviews — the moat a new listing must climb.