Certain aquatic plants are known for their ability to help clean fish ponds by absorbing excess nutrients, improving water quality, and providing natural filtration.  Some fish may nibble on or uproot certain plants, so choose species that are compatible with your fish and pond environment. Go on and read few plants that help keep your pond clean.

• Water Hyacinth (Eichhornia crassipes): Water hyacinth is a floating plant with attractive lavender flowers. It has a high growth rate and can absorb nutrients like nitrates and phosphates, helping to prevent algae blooms and improve water quality. However, it can be invasive in some regions, so it's important to check local regulations before introducing it.

• Water Lettuce (Pistia stratiotes): Water lettuce is another floating plant that forms rosettes of light green leaves. It helps absorb excess nutrients from the water and provides shade, reducing algae growth. Like water hyacinth, it can be invasive in certain areas, so ensure it's allowed in your region.

• Water Lily (Nymphaea spp.): Water lilies are rooted aquatic plants with vibrant flowers. They provide shade, which helps limit sunlight penetration and inhibit algae growth. Their extensive root systems also absorb nutrients from the water.

• Hornwort (Ceratophyllum demersum): Hornwort is a submerged plant that helps oxygenate the water and absorb excess nutrients. It can provide shelter for fish and other aquatic organisms and is relatively easy to grow.

• Anacharis (Elodea canadensis): Anacharis, also known as waterweed, is a submerged plant commonly used in fish ponds. It helps control algae growth by outcompeting them for nutrients and provides oxygenation. It is often appreciated by fish as a hiding place.

• Water Hawthorn (Aponogeton distachyos): Water hawthorn is a floating or partially submerged plant with delicate white flowers. It helps absorb nutrients from the water, adds aesthetic value, and provides cover for fish.

• Parrot's Feather (Myriophyllum aquaticum): Parrot's feather is a submerged or floating plant with feathery foliage. It absorbs nutrients and provides cover for fish. However, it can be invasive, so make sure it's not prohibited in your area.

• Watercress (Nasturtium officinale): Watercress is a semi-aquatic plant that can be grown in shallow areas of the pond. It absorbs nutrients, provides natural filtration, and adds edible foliage to the pond ecosystem.

When adding plants to your fish pond, it's essential to consider the specific needs and conditions required by both the plants and fish. Also, be aware of any local regulations regarding the introduction of non-native or potentially invasive species.