Phytoplankton
FailShoppers spend an estimated $35K a year here, so Phytoplankton is a Fail.
- Flapen Score
- 44 / 100Ranks 2,946 of 3,978 Pet Supplies niches · −7 vs the category median of 5144
- Market size
- $35K/yr37K searches / yr
- 90-day growth
- -13.9%search demand this quarter
- Competition
- 62%top-5 click share · 11 brands · 31 sellers
Flapen Score
Phytoplankton against its category
The dotted line is the Pet Supplies average. Past it, Phytoplankton is stronger. Inside it, weaker.
Market
The Phytoplankton market on Amazon at a glance
Shoppers on Amazon United States searched for Phytoplankton 37K times last year and spent an estimated $35K. The top 5 brands take 89% of clicks. Flapen scores it 44 out of 100, a Fail.
01 · Demand
An estimated 3.8% of those searches ended in a purchase.
Shoppers searched for this 37K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 3.8% of those searches ended in a purchase. Searches in the last 90 days moved -13.9% against the 90 days before. Searches, conversion and average price together put the market at an estimated $35K a year.
- Searches, last 12 months
- 37K
- Growth, 90 days vs prior 90
- -13.9%
- Conversion, latest week
- 3.8%
- Market size, estimated
- $35Ka year
- Peak month
- February1.4× the quietest month
- Top search term
- phytoplankton28K searches a year
02 · Price
A sale here is worth $24.46.
Listings sell for $24.46 on average, from $9.90 to $44.99. Amazon reports units sold in ranges. This niche sold 2K to 3K a year. The average listing sells 100 to 250 of them. At $24.46 that is $2K to $6K a year per listing.
- Average price
- $24.46inside the $15 to $100 sweet spot
- Price range
- $9.90–$44.99
- Amazon United States median price
- $24.38across 115,062 niches
- Units sold a year
- 2K–3K
- Units per listing a year
- 100–250
- Revenue per listing a year
- $2K–$6K
- Returns
- 0.2%of orders · Amazon United States median 2.1%
03 · Entry bar
The bar here is low.
80% of listings pay for placement with sponsored ads. 75% ship with Prime. On an average day, 0.0% of listings are out of stock. The average listing ranks #1,365 within Fish & Aquatic Pets. It carries 274 reviews at 4.55 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 80%
- Prime listings
- 75%
- Out of stock, average day
- 0.0%
- Average rank
- #1,365in Fish & Aquatic Pets
- Average rating
- 4.55 starsAmazon United States average 4.42 stars
- Average reviews
- 274per listing
- Listings tracked
- 20
04 · Newcomers
0 of last year's 1 launches cleared the first-year sales bar.
1 products launched here in the last 12 months. 0 of them cleared the first-year sales bar, our mark for a successful launch. The brands on the shelf have sold for 84 months on average, so the names here are established.
- Launched, last 12 months
- 1
- Successful launches
- 0Amazon's first-year sales bar
- Average brand age
- 84 months
Products
Top Phytoplankton products & what they sell for
The products selling here, as shoppers see them on Amazon. Shelf share and sales are our estimates.
Prices and ratings read from Amazon on Jul 17, 2026. The live listing can differ.
Top sellers
by estimated 90-day click share
Reef Phytoplankton 250 mL / 8.5 fl. oz.
- Price
- $12.05
- Rating
- 4.5/5
- Reviews
- 1,036
- Age
- 15y ago

Brightwell Aquatics PhytoChrom - Concentrated Phytoplankton Suspension for Improved Health and Coloration of Corals and Invertebrates 250-ml
- Price
- $11.25
- Rating
- 4.7/5
- Reviews
- 126
- Age
- 22y ago

OceanMagik Live Phytoplankton Blend - Tetra x Nanno x Iso x Thal Phyto Food for Coral and Copepod (32oz)
- Price
- $25.00
- Rating
- 4.4/5
- Reviews
- 345
- Age
- 10y ago

Reef Phytoplankton 500 mL / 16.9 fl. oz.
- Price
- $19.38
- Rating
- 4.6/5
- Reviews
- 560
- Age
- 15y ago

Brightwell Aquatics PhytGreen-M Marine Phytoplankton for Reef Aquariums Supports Corals Sponges Clams Tube Worms & Filter Feeders Amino Acids EPA 500 ml
- Price
- $22.61
- Rating
- 4.5/5
- Reviews
- 107
- Age
- 22y ago
Trending
estimated 90-day click momentum
Complete Green Water (Chlorella vulgaris) Culture and Expansion Kit: One 8 oz Working Container One 1 oz Backup Container Harvesting Tools and Tap Water Conditioner - Live phytoplankton
- Price
- $39.94
- Rating
- 5.0/5
- Reviews
- 1
- Age
- 2mo ago

OceanMagik Live Phytoplankton Blend - Tetra x Nanno x Iso x Thal Phyto Food for Coral and Copepod 16oz
- Price
- $14.99
- Rating
- 4.4/5
- Reviews
- 345
- Age
- 11y ago

Brightwell Aquatics PhytGreen-M Marine Phytoplankton for Reef Aquariums Supports Corals Sponges Clams Tube Worms & Filter Feeders Amino Acids EPA 500 ml
- Price
- $22.61
- Rating
- 4.5/5
- Reviews
- 107
- Age
- 22y ago

Marine Phytoplankton Omega 3 Supplement Plant-Based Algae Capsules for Energy Focus & Cellular Support Vegan Superfood for Brain Heart & Skin Health 1 000mg 60 Vegan Capsules
- Price
- $35.11
- Rating
- 4.6/5
- Reviews
- 48
- Age
- 5y ago

Barrier Reef Labs Phyto GroFormula (75g) Phytoplankton Reef Food Marine Phytoplankton for Saltwater Aquarium
- Price
- $15.59
- Rating
- 4.8/5
- Reviews
- 16
- Age
- 1y ago
Newest
by launch date
Complete Green Water (Chlorella vulgaris) Culture and Expansion Kit: One 8 oz Working Container One 1 oz Backup Container Harvesting Tools and Tap Water Conditioner - Live phytoplankton
- Price
- $39.94
- Rating
- 5.0/5
- Reviews
- 1
- Age
- 2mo ago

Barrier Reef Labs Phyto GroFormula (75g) Phytoplankton Reef Food Marine Phytoplankton for Saltwater Aquarium
- Price
- $15.59
- Rating
- 4.8/5
- Reviews
- 16
- Age
- 1y ago

AKI Marine Phytoplankton Powder - Source of Raw Omega-3 EPA Micro Algae Nannochloropsis - Plant Based Proteins Vitamins for Overall Wellness - Complete Protein Source Vegan & GMO Free (2oz/57g)
- Price
- $27.47
- Rating
- 4.6/5
- Reviews
- 113
- Age
- 4y ago

Aqua Algae F2 Ferts (16oz) Concentrated Guillards F/2 Formula for Phytoplankton Culture - Professional Algae Fertilizer for Nannochloropsis & Tetraselmis - Boosts Copepod & Reef Tank Health
- Price
- $28.14
- Rating
- 4.6/5
- Reviews
- 139
- Age
- 5y ago

Marine Phytoplankton Omega 3 Supplement Plant-Based Algae Capsules for Energy Focus & Cellular Support Vegan Superfood for Brain Heart & Skin Health 1 000mg 60 Vegan Capsules
- Price
- $35.11
- Rating
- 4.6/5
- Reviews
- 48
- Age
- 5y ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 62% of clicks. Leaders hold, but buyers still shop past them.
Brands
11 rising
Sellers
31
Est. top-5 brand share
89%
Top 20: 100%
Est. top-5 click share
62%
Top 20: 100%
Open market
9%
- Seachem37%
- Brightwell Aquatics24%
- AlgaeBarn19%
- Holistic Bin6%
- Aqua Algae3%
- Oceans Alive3%
- Open — no brand owns it (5 brands, 9%)
Demand
Phytoplankton search demand
Weekly searches over the year, seasonality beneath. Pick a range.
No pronounced peak months · busiest ÷ quietest = 1.4×
Search terms
Top Phytoplankton search terms shoppers use
The exact words shoppers type, with estimated yearly volume, growth, and conversion.
- phytoplankton28K/yr
- phytoplankton for saltwater aquarium5K/yr
- live phytoplankton5K/yr
Reviews and returns
What reviews say buyers love and hate about Phytoplankton
We read the reviews and the return reasons for every product selling here.
“Will be paying double for a usable product”
Every topic
Every topic buyers talk about, one row each.
Red shows the share of negative reviews and green the share of positive reviews, biggest topic first. Open a row to read what they wrote.
16 topics
Keep looking
Related niches
Niches in the same category that score near this one. Research these next.
Best Flapen score
The highest-scoring niches we track right now, across every category.
FAQ
Common Phytoplankton questions
Answered from the same tracked data.
Figures on this page are estimates modeled from public Amazon pages and third-party keyword data. Amazon does not supply them, and no connected seller's data is used. How we handle Amazon data









