---
title: "Crushed Coral for Freshwater Aquarium — $247K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/pet-supplies/crushed-coral-for-freshwater-aquarium"
last_updated: "2026-07-21T22:14:30.310Z"
locale: en
meta:
description: "Niche score 51/100 · $247K/yr market · 141K searches/yr · $15.79 avg price. Soft demand (-9.8% this quarter) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 51/100 · $247K/yr market · 141K searches/yr · $15.79 avg price. Soft demand (-9.8% this quarter) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Crushed Coral for Freshwater Aquarium — $247K/yr Amazon US Niche (2026) - Flapen"
---
# **crushed coral for freshwater aquarium**
**Worth a look**
Shows low returns (0.7%), but soft demand (-9.8% this quarter) keeps it on the watch list.
Market size 46Growth 20Conversion 91Competition 24Returns 96Price range 62Avg price 77Brand share 49Review moat 87Quality gap 27
**Returns**
**Incredible****0.7%**
return rate — above 6% kills the launch gate
**Conversion**
**Great****11.1%**
search→purchase rate — share of searches ending in a sale
**Review moat**
**Great****261.5**
avg incumbent reviews — the moat a new listing must climb
**Avg price**
**Great****$15.79**
avg listing price — sweet spot $15–$100
**Price range**
**Good****$7.03–$28.14**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Brand share**
**Okay****76%**
top-5 brand share — brands hold most of the demand
**Market size**
**Okay****$247K**
$247K/yr · 141K searches
**Quality gap**
**Okay****4.6★**
avg incumbent rating — lower means beatable quality
**Competition**
**Bad****71%**
top-5 click share — a locked-up shelf
**Growth**
**Bad****-9.8%**
90-day search growth — must beat 0% to launch
According to Flapen's Amazon United States niche tracking, crushed coral for freshwater aquarium is a $247K/yr Amazon United States market (141K searches/yr). The top 5 brands hold 76% of demand. Verdict: Worth a look — 51/100.
Data updated Jul 17, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **crushed coral for freshwater aquarium market data**
- **Units sold / yr**
- **13K–15K**
- avg 500–750/product
- **Revenue / yr**
- **$197K–$237K**
- units × avg price
- **Launch success**
- **0%**
- 0 of 5 new (360d)
- **Conversion rate**
- **11.1%**
- **Avg BSR**
- **#486**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **69%**
- **Out of stock**
- **0.4%**
- **Avg brand age**
- **56 months**
- **Avg seller age**
- **172 days**
## **Competition & brand share**
The top 5 products capture 71% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**14 **▼falling
**Sellers**
**21**
**Top-5 brand share**
**76%**
Top 20: 100%
**Top-5 click share**
**71%**
Top 20: 100%
**Open market**
**20%**
- Lighibeuty31% - HHCSMDIYOYU22% - SuSulaicai9% - Carib Sea8% - MYRIONT5% - Estes5%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -9.8% search growth over the last 90 days.
3K2KSpike '25Spike '26 seasonSepDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 1.3×
[**Open Trend **](https://flapen.com/research/us/pet-supplies/crushed-coral-for-freshwater-aquarium/trend)
## **Top crushed coral for freshwater aquarium search terms**
- **crushed coral for freshwater aquarium**71K/yr-11.5%11.3% conv. - **crushed coral**41K/yr-5.1%6.9% conv. - **crushed coral for aquarium**18K/yr-14.7%6.7% conv. - **crushed coral for saltwater aquarium**4K/yr+14.1%1.7% conv. - **aquarium crushed coral**3K/yr-18.8%9.0% conv. - **crush coral for aquariums**3K/yr-16.8%5.0% conv. [**All search terms **](https://flapen.com/research/us/pet-supplies/crushed-coral-for-freshwater-aquarium/search-terms)
## **Top crushed coral for freshwater aquarium 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%$25K20%$49K30%$74K40%$99K101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 16 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Lighibeuty Crushed Coral Filter for Aquarium Fish Tank Crushed Coral for Freshwater Aquarium Ph Aquarium Bio Filter Media Bag Reusable Aquarium Filter**Lighibeuty**$14.94**4.6★239 rev](https://www.amazon.com/dp/B0DKRVL1RR) [2**HHCSMDIYOYU 1.1lb/500g Crushed Coral Natural Fish Tank Crushed Coral Crushed Coral Filter for Freshwater Aquarium Ph Aquarium Bio Filter Media Bag Reusable Aquarium Filter**HHCSMDIYOYU**$12.47**4.6★152 rev](https://www.amazon.com/dp/B0F3CSK652) [3**SuSulaicai Crushed Coral for Freshwater Aquarium Fish Tank Crushed Coral Aquarium Filter Media for Freshwater Aquarium Ph Aquarium Bio Filter Media Bag Reusable Aquarium Filter**SuSulaicai**$11.29**4.9★40 rev](https://www.amazon.com/dp/B0FRN87PM6) [4**Carib Sea ACS00120 Crushed Coral for Aquarium 15-Pound**Carib Sea**$28.14**4.5★373 rev](https://www.amazon.com/dp/B00BUFUP9U) [5**MYRIONT 500g/1.1lb Crushed Coral for Freshwater Aquarium Pond Filter Aquarium Filter Media to Raise ph Reusable Aquarium Filter Fish Tank Coral Stones**MYRIONT**$12.81**4.6★90 rev](https://www.amazon.com/dp/B0DWLBM86C)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Dacwiko Crushed Coral Filter for Aquarium Reusable Aquarium Filter Fish Tank Crushed Coral for Freshwater Aquarium Ph Aquarium Bio Filter Media Bag (1.1lb/500g)**Dacwiko**$9.99**13 rev7mo ago](https://www.amazon.com/dp/B0G4J8D64F) [**SuSulaicai Crushed Coral for Freshwater Aquarium Fish Tank Crushed Coral Aquarium Filter Media for Freshwater Aquarium Ph Aquarium Bio Filter Media Bag Reusable Aquarium Filter**SuSulaicai**$11.29**40 rev10mo ago](https://www.amazon.com/dp/B0FRN87PM6) [**CAPUFIB 500g/1.1lb Crushed Coral for Freshwater Aquarium Pond Filter Aquarium Filter Media to Raise ph Reusable Aquarium Filter Fish Tank Coral Stones**CAPUFIB**$10.19**13 rev11mo ago](https://www.amazon.com/dp/B0FK36S2RB) [**Crushed Coral for Freshwater Aquarium Crushed Coral Media Sand for Freshwater Fish Tank Plant Pot Decorations Accessories (1.1lb/500g)**Generic**$14.48**18 rev11mo ago](https://www.amazon.com/dp/B0FJM3KVHD) [**YOSMAKIY 2.2lb/1000g Crushed Coral Use for Crushed Coral for Freshwater Aquarium Reusable Filter Material for Freshwater Aquariums.**YOSMAKIY**$20.75**25 rev12mo ago](https://www.amazon.com/dp/B0FJFWS7T6)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Hakefyna 1.1 LB Coral for Fish Tank Filter Crushed Coral for Aquarium Pond Filter for Aquarium - Crushed Coral for Freshwater Aquarium Aquarium Filter Coral Stones Each One is Hand Selected**Hakefyna**$14.14**4.6★**▲ 222%**](https://www.amazon.com/dp/B0DPYJWJS4) [**CAPUFIB 500g/1.1lb Crushed Coral for Freshwater Aquarium Pond Filter Aquarium Filter Media to Raise ph Reusable Aquarium Filter Fish Tank Coral Stones**CAPUFIB**$10.19**4.4★**▲ 107%**](https://www.amazon.com/dp/B0FK36S2RB) [**SuSulaicai Crushed Coral for Freshwater Aquarium Fish Tank Crushed Coral Aquarium Filter Media for Freshwater Aquarium Ph Aquarium Bio Filter Media Bag Reusable Aquarium Filter**SuSulaicai**$11.29**4.9★**▲ 78%**](https://www.amazon.com/dp/B0FRN87PM6) [**Dacwiko Crushed Coral Filter for Aquarium Reusable Aquarium Filter Fish Tank Crushed Coral for Freshwater Aquarium Ph Aquarium Bio Filter Media Bag (1.1lb/500g)**Dacwiko**$9.99**4.8★**▲ 71%**](https://www.amazon.com/dp/B0G4J8D64F) [**Jtuxcke Fish Tank Filter Crushed Coral for Freshwater Aquarium Material Pond Filter Media to stabilize Raise ph in Freshwater Fish Tank Filter Medi Reusable Crushed corrals (500g/1.1lb)**Jtuxcke**$10.43**4.3★**▲ 61%**](https://www.amazon.com/dp/B0F7K2F9FH)
**~~View all trending →~~**
## **What buyers say about crushed coral for freshwater aquarium**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**23%
*“Excellent quality”*
**Value For Money**14%
*“Good deal”*
**Advertised Vs Actual Product**13%
*“Worked like it should”*
**Water Flow**9%
*“Helps with water parameters and breeding”*
**Size-Overall**8%
*“Some good size pieces that look cool”*
**Ease Of Cleaning**7%
*“Either way, I appreciate having a tank that looks cleaner between cleanings and requires a little less fuss”*
**Filtration**6%
*“filters that have helped”*
**Freshness**3%
*“Great 4 Freshwater”*
**Color**3%
*“The appearance, size, and color really enhance the aquarium plants and livestock”*
**Ease Of Use**3%
*“with a wide variety of uses”*
### **What buyers complain about **
**Value For Money**20%
*“Very expensive Little Rocks”*
**Size-Overall**10%
*“The bags were bigger than I expected”*
**Durability**7%
*“They died in 4 days”*
**Functionality-Overall**7%
*“Didnt work for me”*
**Advertised Vs Actual Product**6%
*“Not quite as described”*
**Ease Of Cleaning**5%
*“very dirty had to rinse 3 times before using”*
**Water Flow**5%
*“.Harder water can cause them to break down faster”*
**Natural Resource Wastage**4%
*“Sorry, total waste in my tanks”*
**Residue**4%
*“some lose bits buried in my substrate”*
**Smell**4%
*“it had a horrible rotten egg smell thats made my whole aquarium cabinet smell bad”*
### **Top return reasons **
**Size-Overall**41%
**Advertised Vs Actual Product**16%
**Functionality-Overall**10%
**Value For Money**6%
**Filtration**4%
**Defective Material/Parts**4%
**Smell**3%
**Color**3%
**Texture/Consistency-Overall**2%
**Compatibility-Overall**2%
## **Common questions**
- **Is crushed coral for freshwater aquarium profitable to sell on Amazon United States?**
- The niche generates $247K/yr across 16 tracked products. 0 of 5 products launched in the last 360 days are still selling. 90-day search growth is -9.8%. Flapen's verdict: Worth a look (51/100).
- **How competitive is the crushed coral for freshwater aquarium niche?**
- 14 brands and 21 sellers compete. The top 5 products take 71% of clicks and top 5 brands hold 76% of demand.
- **What do buyers complain about in crushed coral for freshwater aquarium?**
- Top complaints mined from reviews: Value For Money, Size-Overall, Durability. The return rate is 0.7%.
- **When does demand for crushed coral for freshwater aquarium peak?**
- Demand is steady year-round — the busiest month runs 1.3× the quietest.
- **What does it cost to enter the crushed coral for freshwater aquarium niche?**
- Listings span $7.03–$28.14; the average listing price is $15.79 (sweet spot $15–$100). The average incumbent carries 262 reviews — the moat a new listing must climb.
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