New
Live Marine Rotifers (L-Type Brachionus) — Built for Breeders
SKU: ROT-LIVE-4OZ
L-type Brachionus plicatilis — 150–360 microns, 500–1,000 per mL, made to order every week. Sized for the mouth opening of first-feed marine larvae including clownfish fry, seahorse fry, mandarin fry, dottybacks, and angelfish.
Day-zero feeding. Most live rotifer products ship as starter cultures that require 14–21 days of grow-out before they reach productive density. Our packs ship from a productive parent culture — open the bag, acclimate, and feed directly.
Every bag is a document, not a guess. A signed Certificate of Analysis ships with every order: density declared, count verified, batch dated and traceable.
Weekly schedule (Tuesday harvest):
- Tue 7am — harvested from the parent culture at peak density
- Tue 1pm — Quality Report signed (density, vigor, water parameters)
- Tue 4pm — packed in phase-change insulated mailer, shipped same day
- Wed — at your door (overnight) — refrigerate immediately
Order by Tuesday 10am ET to ship the same week.
Sizes available
- 4 oz (118 mL) — ~60k to 120k rotifers — single feeding / test pack
- 16 oz (473 mL) — ~240k to 470k rotifers — small clownfish breeder
- 32 oz (946 mL) — ~470k to 950k rotifers — mid-sized breeder
- 1 Gallon (3.8 L) — ~1.9M to 3.8M rotifers — hatchery / serious breeder
On arrival
Refrigerate immediately. Lid cracked for air exchange — never seal airtight. Warm to room temperature before feeding. Best within 5 days of arrival.
To feed: Pour or pipette directly into your target tank, or strain through a 53-micron sieve and rinse. Turn off skimmers and strong return flow for 15–60 minutes so larvae can graze.
To start your own culture: Add to clean prepared saltwater with gentle aeration and low light. Feed live phytoplankton or commercial rotifer feed. Harvest about 25% daily to keep the population young and productive.
Specifications
- Scientific name: Brachionus plicatilis (L-type)
- Lorica length: 150–360 microns
- Doubling time: ~24 hours under optimal conditions
- Salinity tolerance: 5–40 ppt
- Temperature tolerance: 60–82°F (slowed at colder temps)
- Shipping form: Live, actively reproducing culture in growing water
Live Arrival Guarantee
100% Live Arrival Guarantee on overnight orders. Photo or video evidence of an unopened bag at delivery required for claims within 2 hours of arrival. 2-day shipping carries reduced coverage given the longer transit window.
L-type Brachionus plicatilis — 150–360 microns, 500–1,000 per mL, made to order every week. Sized for the mouth opening of first-feed marine larvae including clownfish fry, seahorse fry, mandarin fry, dottybacks, and angelfish.
Day-zero feeding. Most live rotifer products ship as starter cultures that require 14–21 days of grow-out before they reach productive density. Our packs ship from a productive parent culture — open the bag, acclimate, and feed directly.
Every bag is a document, not a guess. A signed Certificate of Analysis ships with every order: density declared, count verified, batch dated and traceable.
Weekly schedule (Tuesday harvest):
- Tue 7am — harvested from the parent culture at peak density
- Tue 1pm — Quality Report signed (density, vigor, water parameters)
- Tue 4pm — packed in phase-change insulated mailer, shipped same day
- Wed — at your door (overnight) — refrigerate immediately
Order by Tuesday 10am ET to ship the same week.
Sizes available
- 4 oz (118 mL) — ~60k to 120k rotifers — single feeding / test pack
- 16 oz (473 mL) — ~240k to 470k rotifers — small clownfish breeder
- 32 oz (946 mL) — ~470k to 950k rotifers — mid-sized breeder
- 1 Gallon (3.8 L) — ~1.9M to 3.8M rotifers — hatchery / serious breeder
On arrival
Refrigerate immediately. Lid cracked for air exchange — never seal airtight. Warm to room temperature before feeding. Best within 5 days of arrival.
To feed: Pour or pipette directly into your target tank, or strain through a 53-micron sieve and rinse. Turn off skimmers and strong return flow for 15–60 minutes so larvae can graze.
To start your own culture: Add to clean prepared saltwater with gentle aeration and low light. Feed live phytoplankton or commercial rotifer feed. Harvest about 25% daily to keep the population young and productive.
Specifications
- Scientific name: Brachionus plicatilis (L-type)
- Lorica length: 150–360 microns
- Doubling time: ~24 hours under optimal conditions
- Salinity tolerance: 5–40 ppt
- Temperature tolerance: 60–82°F (slowed at colder temps)
- Shipping form: Live, actively reproducing culture in growing water
Live Arrival Guarantee
100% Live Arrival Guarantee on overnight orders. Photo or video evidence of an unopened bag at delivery required for claims within 2 hours of arrival. 2-day shipping carries reduced coverage given the longer transit window.