---
title: "Ph Minus — £98K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/home-garden/ph-minus"
last_updated: "2026-07-31T22:25:05.594Z"
locale: en
meta:
description: "Niche score 59/100 · £98K/yr market · 51K searches/yr. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 59/100 · £98K/yr market · 51K searches/yr. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Ph Minus — £98K/yr Amazon UK Niche (2026) - Flapen"
---
# **ph minus**
**Worth a look**
Shows demand growing +703.8% this quarter, but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Market size 25Growth 100Conversion 98Competition 40Returns 99Price range 31Avg price 41Brand share 47Review moat 69Quality gap 25
**Growth**
**Incredible****+703.8%**
90-day search growth — must beat 0% to launch
**Returns**
**Incredible****0.2%**
return rate — above 5% kills the launch gate
**Conversion**
**Incredible****17.5%**
search→purchase rate — share of searches ending in a sale
**Review moat**
**Good****753.06**
avg incumbent reviews — the moat a new listing must climb
**Brand share**
**Okay****77%**
top-5 brand share — brands hold most of the demand
**Avg price**
**Okay****£10.95**
avg listing price — sweet spot $15–$100
**Competition**
**Okay****61%**
top-5 click share — leaders hold, buyers still browse
**Price range**
**Okay****£5.37–£19.33**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Market size**
**Bad****£98K**
£98K/yr · 51K searches
**Quality gap**
**Okay****4.6★**
avg incumbent rating — lower means beatable quality
**Signals**[** Trending**](https://flapen.com/research/niches?market=uk&signal=trending "Search growth > 100% (90d)")
According to Flapen's Amazon United Kingdom niche tracking, ph minus is a £98K/yr Amazon United Kingdom market (51K searches/yr). The top 5 brands hold 77% of demand. Demand peaks in May–Jun–Jul. Verdict: Worth a look — 59/100.
Data updated Jul 26, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **ph minus market data**
- **Units sold / yr**
- **10K–13K**
- avg 500–750/product
- **Revenue / yr**
- **£110K–£137K**
- units × avg price
- **Conversion rate**
- **17.5%**
- **Avg BSR**
- **#20**
- **Page quality**
- **0%**
- **Prime**
- **56%**
- **Sponsored**
- **83%**
- **Out of stock**
- **3.3%**
- **Avg brand age**
- **67 months**
- **Avg seller age**
- **184 days**
## **Competition & brand share**
The top 5 products take 61% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**11 **▲rising
**Sellers**
**25**
**Top-5 brand share**
**77%**
Top 20: 100%
**Top-5 click share**
**61%**
Top 20: 100%
**Open market**
**15%**
- Clearwater28% - SHATCHI22% - Bluewater Pools & Spa Chemicals10% - SUDS-ONLINE9% - bluewater POOL & SPA CHEMICALS8% - Zagosa8% - Open — no brand owns it (5 brands, 15%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — +703.8% search growth over the last 90 days.
6K4KSpike '24Spike '25Prime Day '25Spike '26Prime Day '26 seasonSepDecMarJunAugNovMarMay
Peak months: May, Jun, Jul · busiest ÷ quietest = 18.3×
[**Open Trend **](https://flapen.com/research/uk/home-garden/ph-minus/trend)
## **Top ph minus search terms**
- **ph minus**17K/yr+971.6%15.6% conv. - **ph minus swimming pool**6K/yr>1,000%18.0% conv. - **ph minus hot tub**8K/yr+184.0%21.1% conv. - **ph reducer for swimming pool**5K/yr>1,000%19.2% conv. - **ph reducer**4K/yr+455.1%14.6% conv. - **ph decreaser for pool**3K/yr>1,000%15.4% conv. - **clearwater ph minus**3K/yr+844.3%16.3% conv. - **ph reducer hot tub**4K/yr+198.9%22.2% conv. [**All search terms **](https://flapen.com/research/uk/home-garden/ph-minus/search-terms)
## **Top ph minus 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%£10K20%£20K30%£30K40%£39K1101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)1 product missing review or click data not plotted
All 18 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**1.5 Kg pH Minus Reducer Granules for Hot Tubs and Paddling Pools**SHATCHI**£7.93**4.6★223 rev](https://www.amazon.co.uk/dp/B098B9SHW5) [2**Clearwater pH Minus Decreaser 1.5 kg Granules for Spa Hot Tub & Swimming Pool Water Treatment Lowers pH & Improves Water Balance**Clearwater**£10.29**5.0★3 rev](https://www.amazon.co.uk/dp/B0H5W5SJ9H) [3**7kg pH Minus - Bluewater Swimming Pool & Spa Chemicals - PoolShopUK**Bluewater Pools & Spa Chemicals**£15.82**4.7★398 rev](https://www.amazon.co.uk/dp/B01MZWX51E) [4**Bluewater 750g pH Minus - Swimming Pool & Spa Chemicals Above Ground Paddling Pool pH Balancer**bluewater POOL & SPA CHEMICALS**£7.45**4.5★99 rev](https://www.amazon.co.uk/dp/B07YDY1KKL) [5**Clearwater pH Plus Increaser - 1 kg Granules for Hot Tub Spa & Swimming Pool Water Treatment Boosts pH & Improves Water Balance**Clearwater**£7.41**4.6★7,880 rev](https://www.amazon.co.uk/dp/B003O2F15A)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Clearwater pH Minus Decreaser 1.5 kg Granules for Spa Hot Tub & Swimming Pool Water Treatment Lowers pH & Improves Water Balance**Clearwater**£10.29**3 rev1mo ago](https://www.amazon.co.uk/dp/B0H5W5SJ9H) [**Safe Splash pH Minus 7kg Granules pH Reducer for Hot Tub & Swimming Pool Water pH Down for Spas Inflatable & Garden Pools Easy Dosing for Clear Comfortable Water**SafeSplash**£19.33**3 rev3mo ago](https://www.amazon.co.uk/dp/B0GWRRZQNS) [**Clearwater pH Minus Decreaser 3 kg Granules for Hot Tub Spa & Swimming Pool Water Treatment Lowers pH & Improves Water Balance**Clearwater**£16.62**5 rev7mo ago](https://www.amazon.co.uk/dp/B0G5YNSKH4) [**pH Down pH Minus Decreaser 1.5kg For Swimming Pools Hot Tubs & Spas pH Reducer Lowers pH Levels in Pools & Hot Tubs Total Alkalinity TA Control Decreases pH Levels No More Mr Nice Guy**No More Mr Nice Guy**£11.32**40 rev2y ago](https://www.amazon.co.uk/dp/B0D6W7T9DK) [**Deep Blue PH Minus 1Kg pH decreaser**Deep Blue**£9.59**0 rev2y ago](https://www.amazon.co.uk/dp/B0CWLS1X5T)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Safe Splash pH Minus 7kg Granules pH Reducer for Hot Tub & Swimming Pool Water pH Down for Spas Inflatable & Garden Pools Easy Dosing for Clear Comfortable Water**SafeSplash**£19.33**5.0★**▲ 38%**](https://www.amazon.co.uk/dp/B0GWRRZQNS) [**Clearwater pH Minus Decreaser 1.5 kg Granules for Spa Hot Tub & Swimming Pool Water Treatment Lowers pH & Improves Water Balance**Clearwater**£10.29**5.0★**▲ 38%**](https://www.amazon.co.uk/dp/B0H5W5SJ9H) [**pH/KH Reducer ARKA pH Decrease 118ml lowers pH & carbonate hardness safely freshwater water conditioner with electrolytes protects slime coat ideal for Discus Tetras & soft water aquariums**ARKA**£5.37**4.3★**▲ 36%**](https://www.amazon.co.uk/dp/B003Z46P9I) [**Clearwater TA Plus Alkalinity Increaser for Swimming Pool and Spa Treatment White 19.0 cm*9.7 cm*9.7 cm**Clearwater**£9.08**4.7★**▲ 26%**](https://www.amazon.co.uk/dp/B07PMD91XM) [**Deep Blue PH Minus 1Kg pH decreaser**Deep Blue**£9.59**0.0★**▲ 22%**](https://www.amazon.co.uk/dp/B0CWLS1X5T)
**~~View all trending →~~**
## **What buyers say about ph minus**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Value For Money**47%
*“Good value. Arrived quick good value for.”*
**Advertised Vs Actual Product**22%
*“Works as it should”*
**Quality-Overall**17%
*“Great Product”*
**Efficiency**6%
*“Works well would recommend”*
**Heating**6%
*“Perfect for the hot tub”*
**Ease Of Use**3%
*“Really effective and easy to use”*
### **What buyers complain about **
**Functionality-Overall**25%
*“Doesnt work”*
**Advertised Vs Actual Product**25%
*“Doesnt do what it says”*
**Value For Money**25%
*“Waste of money”*
**Natural Resource Wastage**13%
*“Absolute waste of of money no chlorine in them did nothing for the water”*
**Water Resistance**13%
*“Absolute waste of of money no chlorine in them did nothing for the water”*
### **Top return reasons **
**Advertised Vs Actual Product**33%
**Leak-Proof**26%
**Functionality-Overall**9%
**Size-Overall**7%
**Product Condition**4%
**Defective Material/Parts**3%
**Contamination**2%
**Ease Of Cleaning**2%
**Value For Money**2%
**Measurement/Reading Accuracy**2%
## **Common questions**
- **Is ph minus profitable to sell on Amazon United Kingdom?**
- The niche generates £98K/yr across 18 tracked products. 0 of 3 products launched in the last 360 days are still selling. 90-day search growth is +703.8%. Flapen's verdict: Worth a look (59/100).
- **How competitive is the ph minus niche?**
- 11 brands and 25 sellers compete. The top 5 products take 61% of clicks and top 5 brands hold 77% of demand.
- **What do buyers complain about in ph minus?**
- Top complaints mined from reviews: Functionality-Overall, Advertised Vs Actual Product, Value For Money. The return rate is 0.2%.
- **When does demand for ph minus peak?**
- Demand peaks in May–Jun–Jul; the busiest month runs 18.3× the quietest.
- **What does it cost to enter the ph minus niche?**
- Listings span £5.37–£19.33; the average listing price is £10.95 (sweet spot $15–$100). The average incumbent carries 753 reviews — the moat a new listing must climb.
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