Microworms are a small nematode (less than 3 mm) that feeds off yeast in the fermenting medium. Kept in moist oat mixture the microworms quickly populate the culture and will climb the sides of the container. Microworms are considered highly attractive as an early feed for fry due to their relatively high fat content of the organism (around 20% of dry matter).
Microworms are simple to keep and easy to feed to young freshwater fish. Microworms should be kept around room temperature in a relatively shallow container out of direct sunlight. Once a culture is started, with correct maintenance it is possible to have an indefinite supply of nutritious feed for your fry.
Instructions for culture starting:
- Select a relatively shallow container that will provide a large surface area.
- Cook enough oatmeal (or plain instant porridge) to cover the bottom of the container in 1-3cm thick of the mixture.
- Wait for oats to cool to room temperature before adding to the container.
- Once oats have been spread across the bottom add an even but not thick coating of yeast powder and then stir it in.
- Add starter culture to the mixture and mix through (mixture should be very moist but not covered in excess water)
- Add cover (with air holes) and wait for around 5 days to a week before worms will be ready to harvest.
Instructions for harvesting
- Once worm have been cultured for a week or so they will be seen climbing the walls of the container
- Using a cotton tip swipe around the edges of the walls to collect the worms
- Wash the tip in a small amount of tank water to remove the worms
- Using a pipet add an appropriate amount of worms for the fry to eat (do not add excess amounts as the worms will be wasted and reduce the water quality)
Instructions for maintenance
- Once weekly stir the mixture (microworms will naturally sit of the surface and need to be mixed to keep the culture fresh)
- After a month, the culture should be restarted, or the culture will go bad
- It is recommended to keep at least 2 cultures going at the same time in case one goes bad
They can be used to feed:
- 10 gram (seed a starter culture)
- 100 gram (culture ready to harvest from)