E.1.0 | Protocols and Tables (Grow Out) : Introduction

Growing Rotifers with Instant Algae® Microalgal Concentrates

General information

Using Instant Algae microalgae concentrates in an existing system

  • There is no need to modify you rotifer grow-out system configuration to use Instant Algae feeds (RotiGrow Plus, RotiGrow Nanno, Nanno 3600, RotiGrow Chlorella or Rotifer Diet)
  • General system parameters and Useful tips are provided after the feeding protocols below

Choosing the Right Rotifer Grow-out Feed

Each microalgal concentrate feed has different advantages.


RotiGrow Plus

  • Provides high phospholipid DHA, EPA and ARA pre-enrichment
  • All-in-one grow-out, enrichment and gut pack for applications where HUFA enrichment requirements are less than 40mg/g dw. and DHA:EPA is no more than 1.6:1
  • Very clean and effective
  • High level of pre-enrichment allows use of premium enrichment feeds that are more nutritionally balanced
  • Allows for extremely high DHA enrichment — if desired
  • Microalgal blend
  • Frozen for long shelf life and easy logistics


RotiGrow Nanno

  • Highest biomass conversion rate – least organic waste in your rotifer tank
  • Very clean and effective
  • Produces phospholipid rich rotifers
  • Provides a high EPA and ARA pre-enrichment boost for use with high DHA enrichment protocols
  • Single species – Nannochloropsis. A very tough microalgae and a robust microalgal concentrate feed
  • Frozen for long shelf life and easy logistics


RotiGrow Chlorella

  • Similar to existing Chlorella feeds but with a slightly extended shelf life. Extended shelf life offers easier and less expensive logistics
  • Provides moderate DHA, EPA and ARA enrichment (less than 25mg/d d.w. HUFA)
  • Orders must be arraigned in advance
  • Refrigerate. 4 week shelf life


Nanno 3600

  • Original Instant Algae Nannochloropsis feed
  • Very effective with established protocols
  • Provides a EPA and ARA pre-enrichment boost for use with high DHA enrichment protocols
  • Frozen for long shelf life and easy logistics


Rotifer Diet

  • Original blended Nannochloropsis / Tetraselmis feed
  • Very effective with established protocols
  • Provides a EPA and ARA pre-enrichment boost for use with high DHA enrichment protocols
  • Frozen for long shelf life and easy logistics

Feed Comparison charts

Table E.1: Production efficiency – Rotifer harvest per liter of feed

Table-E.1

* cod fatty acid numbers from Sargent and Toucher 1984

¹ mg/g dry weight

² percent of dry weight

³ Percent of lipids


Table E.2: Typical HUFA pre-enrichment of rotifers harvested from Grow-out tank

Table-E.2



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