Why Algae Appears

Algae need light and nutrients -- exactly what an open, lit reservoir provides. Left alone it steals food and breeds pests.

Prevention

  • Block light -- use an opaque bucket and a lid with only the net-pot hole open.
  • Keep roots dark -- line exposed pipes.
  • Clean between crops -- scrub and rinse the system.
  • Avoid over-feeding -- excess nutrients feed algae too.

Frequently Asked Questions

Q: I already have algae -- now what?

A:

Block all light, change the solution, and clean the surfaces.

Q: Is a little algae harmful?

A:

Mostly cosmetic, but it competes with your plant and can harbour gnats.

Dark equals clean in hydroponics. Build the habit with the care schedule tool.