feed circuit, especially restrictive feed outlets like drippers, can
become blocked with salt build-up, dirt, algae, root growth and medium.
minimize this problem:
- Employ a filter on the inlet to the
nutrient pump. Also, in recirculating systems, install a filter in the
return line (Fig 2.6). Ensure filters have a large surface area. This
will minimize how frequently they need to be cleaned.
plants to avoid roots being drawn into drain outlets.
- Maintain nutrient
pH well below 6.5 to help prevent
disinfect the nutrient
solution to prevent the build-up of algae and slimes.
- Ensure nutrients are fully soluble.
- Avoid using water that has high
- Use stakes to secure the feed outlets
above and away from the medium and
roots to prevent them from becoming blocked.
drippers or sprayers are used, allocate at least two per plant.
Inspect and clean them regularly.
- Use a regular maintenance schedule.
Routine 'discarding' and 'flushing' will help
prevent the build-up of solids such as insoluble salts, algae and plant
debris. Between crops it is useful to perform a chemical flush to remove