crushed coral for freshwater aquarium
Worth a lookShows low returns (0.7%), but soft demand (-9.8% this quarter) keeps it on the watch list.
Returns
Incredible0.7%return rate — above 6% kills the launch gate
Conversion
Great11.1%search→purchase rate — share of searches ending in a sale
Review moat
Great261.5avg incumbent reviews — the moat a new listing must climb
Avg price
Great$15.79avg listing price — sweet spot $15–$100
Price range
Good$7.03–$28.14cheapest to priciest tracked listing — scored on the share inside $15–$100
Brand share
Okay76%top-5 brand share — brands hold most of the demand
Market size
Okay$247K$247K/yr · 141K searches
Quality gap
Okay4.6★avg incumbent rating — lower means beatable quality
Competition
Bad71%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
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.No pronounced peak months · busiest ÷ quietest = 1.3×
Top crushed coral for freshwater aquarium search terms
- crushed coral for freshwater aquarium71K/yr
- crushed coral41K/yr
- crushed coral for aquarium18K/yr
- crushed coral for saltwater aquarium4K/yr
- aquarium crushed coral3K/yr
- crush coral for aquariums3K/yr
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.
All 16 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Lighibeuty Crushed Coral Filter for Aquarium Fish Tank Crushed Coral for Freshwater Aquarium Ph Aquarium Bio Filter Media Bag Reusable Aquarium Filter
Lighibeuty$14.944.6★239 rev
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$12.474.6★152 rev
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$11.294.9★40 rev
Carib Sea ACS00120 Crushed Coral for Aquarium 15-Pound
Carib Sea$28.144.5★373 rev
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$12.814.6★90 rev
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$9.9913 rev
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$11.2940 rev
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$10.1913 rev
Crushed Coral for Freshwater Aquarium Crushed Coral Media Sand for Freshwater Fish Tank Plant Pot Decorations Accessories (1.1lb/500g)
Generic$14.4818 rev
YOSMAKIY 2.2lb/1000g Crushed Coral Use for Crushed Coral for Freshwater Aquarium Reusable Filter Material for Freshwater Aquariums.
YOSMAKIY$20.7525 rev
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$14.144.6★
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$10.194.4★
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$11.294.9★
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$9.994.8★
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$10.434.3★
What buyers say about crushed coral for freshwater aquarium
What buyers praise and complain about, mined from review topics.What buyers love
“Excellent quality”
“Good deal”
“Worked like it should”
“Helps with water parameters and breeding”
“Some good size pieces that look cool”
“Either way, I appreciate having a tank that looks cleaner between cleanings and requires a little less fuss”
“filters that have helped”
“Great 4 Freshwater”
“The appearance, size, and color really enhance the aquarium plants and livestock”
“with a wide variety of uses”
What buyers complain about
“Very expensive Little Rocks”
“The bags were bigger than I expected”
“They died in 4 days”
“Didnt work for me”
“Not quite as described”
“very dirty had to rinse 3 times before using”
“.Harder water can cause them to break down faster”
“Sorry, total waste in my tanks”
“some lose bits buried in my substrate”
“it had a horrible rotten egg smell thats made my whole aquarium cabinet smell bad”
Top return reasons
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.