Submerged pond plants, also called oxygenators, grow primarily underwater. They help improve water quality by absorbing excess nutrients, competing with algae, producing oxygen during daylight, and providing shelter for fish.
Benefits of submerged pond plants
- Natural filtration: Absorb excess nutrients from pond water.
- Algae control: Compete with algae for available nutrients.
- Fish protection: Provide hiding places for small fish and newly hatched fish (fry).
- Oxygen production: Release oxygen during photosynthesis.
Submerged plants support pond health but do not replace proper filtration or aeration.
How to plant submerged pond plants
- Weighted plants: Place the weighted bunches directly into the pond.
- Unweighted plants: Anchor suitable varieties in aquatic planting containers with pond plant media or gravel.
- Floating plants: Rootless varieties, such as hornwort, can grow without being planted.
Planting depth varies by species. Keep loose plants away from skimmers and pump intakes.
Common submerged pond plants
- Anacharis (Egeria densa): Fast-growing plant with clustered green leaves that absorbs nutrients from pond water.
- Hornwort (Ceratophyllum demersum): Rootless plant that provides underwater shelter for fish.
- Cabomba (Cabomba caroliniana): Submerged plant with delicate, fan-shaped leaves.
- Eel grass (Vallisneria americana): Rooted plant with long, ribbon-like leaves that spreads through runners.
Important considerations
- Check local regulations before purchasing aquatic plants, as some species are invasive or restricted.
- Remove excessive plant growth to maintain water circulation.
- Select plants appropriate for your climate and pond conditions.
- Never release pond plants into natural waterways.