Easy DRY Selco® can be used in the traditional way after harvesting from the culture tank or directly into the culture tank at the last day of culture.

Enrichment in rotifer culture tank

Replace the last 8-10h of culture with two rations of EDS up to 2x145ppm T0 and T4

Separate day time enrichment:

• Rotifer density: 1000-2000R/ml Salinity 20-30ppt
• Temperature 25-27°C 
• Aeration medium-strong using open tube aeration
• Keep dissolved oxygen higher than 5ppm by means of a leaky pipe, ceramic stones or other fine bubble device
• Enrich the rotifers using 2 doses of EDS at T0 and T3 as follows:
  • 1000R/ml use up to 135ppm
  • 2000R/ml use up to 145ppm
• Rinse well and feed immediately or put in cold storage at max 15 million rotifer per liter for max 16h

Overnight enrichment (max 24h):

• Harvest the rotifers from the culture tank, rinse and transfer to a new tank at 1000-2000R/ml
• Abiotic parameters: as above separate enrichment
• A background feeding with rotifer culture needs to be given every 6 hours prior the start of enrichment (max. 2 background feedings)
• Enrich the rotifers using 2 doses of EDS at T0 and T4 as follows:
  • 1000R/ml use up to 135ppm
  • 2000R/ml use up to 145ppm

Rotifer enrichment duration and harvesting

Rotifer enrichment with EDS is finalized in 6-9h (do not exceed 
12h). After enrichment harvest and rinse well. Feed to larvae or 
put in cold storage.

Note

Pay attention any enrichment product must be fine-tuned according to rotifer strain and local conditions. 
For assistance contact your local INVE Aquaculture representative.

• Prepare the enrichment tank with clean water at 20-38ppt salinity. Disinfect and pre-heat the water at 26°C. Neutralize before transferring nauplii into the enrichment tank
• Standard enrichment density: 400npl/ml
• Dissolved Oxygen: >4ppm (optimal is 100% saturation). 
• Temperature: 26°C.
• Keep pH: >7.5 (adjust with NaOH and/or sodium bicarbonate as needed)
• Enrich the nauplli using 2 doses of EDS up to 385ppm at T0 and T10
• EDS can be used also at higher nauplii concentrations if needed:
  • with 700npl/ml use 2 doses of EDS 2 doses up to 2x500ppm per dose at T0 and T10
  • with 1000npl/ml use 2 doses of EDS 2 doses up to 2x800ppm per dose at T0 and T10
• Harvest after 18 max 22h from the start of the enrichment
• Rinse well and feed immediately or put in cold storage