Why control matters
A complete surface mat reduces light below and can make feeding or maintenance awkward. Open areas also help surface gas exchange.
The easy weekly method
- Choose the amount of surface cover you want—often 30–60% works well.
- Scoop excess plants with a dedicated net or clean cup.
- Check the removed plants for baby shrimp or snails.
- Repeat during weekly maintenance.
Use a floating corral
Airline tubing joined into a ring can keep a clear feeding area or contain the plants in one section. Anchor the ring with suction cups if the filter moves it.
Reduce growth gently
Shorten the light period slightly and avoid unnecessary fertiliser. Do not use herbicides or copper treatments in a shrimp aquarium.
Dispose responsibly
Dry or seal unwanted plants before placing them in household waste. Never tip duckweed into ponds, streams or drains connected to natural water.
Fast growth is usually a sign the plant has enough light and nutrients—not that anything is wrong.