background plant · easy

Anacharis: height, light, CO₂ & fish that eat it

Egeria densa typically grows 7.9–12 in tall (20–30 cm) and grows in the background of a tank. It's rated for low–high light, and injected CO₂ is not needed. Temperature 39–86°F, pH 5–9.

Restricted in some US states. On prohibited or restricted lists in Washington, Wisconsin, Michigan and South Carolina. Oregon lists it as a quarantined noxious weed; Minnesota allows keeping it but not releasing it. Never release it outdoors.

Try it in the tank builder See which fish eat it

How tall it grows

Each bar is roughly the water depth a tank leaves above the substrate. The teal band is the plant's reported height range. ✓ fits, trim means it can reach the surface, ✕ means it typically outgrows the water.

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Check it with your fish →

Quick facts

Grows to: 7.9–12 in (20–30 cm)
Height basis: Tropica 2-month avg (listed 20-30+); stems 40-100 cm
Where it goes: floating, midground, background
Light: low–high light
Injected CO₂: not needed
Growth: fast
Difficulty: easy
Temperature: 39–86°F
pH: 5–9
Hardness: 0–30 dGH
Feeds through: not published
Also sold as: Anacharis; Brazilian waterweed; dense / large-flowered waterweed; misapplied Elodea canadensis

Planting tip: Strip the lowest 5 cm of leaves and plant stems apart, or leave it floating.

Fish and Anacharis

Checked with the same rules as our tank builder: plant-eating and digging named in each fish's sources, plus temperature and pH overlap.

Eats it (9)

May uproot it (6)

Different water (0)

Every fish shares some temperature and pH range with it.

Fish that leave it alone and share its water (95)

Pearl Gourami Angelfish German Blue Ram Bolivian Ram Kribensis Electric Yellow Lab Bronze Cory Panda Cory Pygmy Cory Julii Cory Bristlenose Pleco Otocinclus Kuhli Loach Hillstream Loach Siamese Algae Eater Cherry Shrimp Amano Shrimp Nerite Snail Mystery Snail Glowlight Tetra Lemon Tetra Congo Tetra Black Neon Tetra Chili Rasbora Boesemani Rainbowfish Dwarf Neon Rainbowfish African Dwarf Frog Pea Puffer Ghost Shrimp Iridescent Shark Bala Shark Red-Tail Shark Rainbow Shark Chinese Algae Eater Neon Tetra Cardinal Tetra Black Skirt Tetra Serpae Tetra Rummy-nose Tetra Ember Tetra Harlequin Rasbora Zebra Danio Celestial Pearl Danio White Cloud Mountain Minnow Cherry Barb Tiger Barb Guppy Endler's Livebearer Molly Platy Swordtail Betta Dwarf Gourami Honey Gourami Head-and-tail-light Tetra Bleeding Heart Tetra Diamond Tetra Silver Tip Tetra Pristella Tetra Penguin Tetra Silver Hatchetfish Marbled Hatchetfish Lambchop Rasbora Pearl Danio Giant Danio Scissortail Rasbora Gold Barb Rosy Barb Odessa Barb Denison Barb Variatus Platy Three-spot Gourami Moonlight Gourami Sparkling Gourami Paradise Fish Cockatoo Dwarf Cichlid Firemouth Cichlid Discus Blood Parrot Cichlid Peppered Cory Sterbai Cory Clown Pleco Pictus Catfish Glass Catfish Upside-down Catfish Weather Loach Forktail Blue-eye Clown Killifish Bumblebee Goby Crystal Red Shrimp Bamboo Shrimp Ramshorn Snail Malaysian Trumpet Snail Assassin Snail Japanese Trapdoor Snail

Common questions

How tall does Anacharis grow?

Growers report about 7.9–12 in (20–30 cm). Basis: Tropica 2-month avg (listed 20-30+); stems 40-100 cm.

How much light does Anacharis need?

It's rated for low–high light. Growers often disagree on light, so this is the full range across our sources.

Does Anacharis need CO₂?

No. Its sources rate its CO₂ need as low, and it grows without injection.

Which fish eat Anacharis?

In our database, Convict Cichlid, Common Pleco, Common / Comet Goldfish, Clown Loach, Tinfoil Barb, Buenos Aires Tetra, Kissing Gourami, Yoyo Loach, Fancy Goldfish are flagged as eating live plants. Tough-leaved anubias usually hold up better.

Is Anacharis legal to buy?

It's on prohibited or restricted lists in Washington, Wisconsin, Michigan and South Carolina. Oregon lists it as a quarantined noxious weed; Minnesota allows keeping it but not releasing it. Never release it outdoors.

Gear for Anacharis

PlantLive Anacharis. Compare sellers and pot sizes.Find on Amazon →LightA basic aquarium LED is enough for low light.Find on Amazon →FertilizerA liquid fertilizer for plants that feed from the water.Find on Amazon →

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Sources

Values come from these pages, in our own words. Where growers disagree, we show the full range. Last reviewed 2026-10-17.

tropica.com /en/plants/plantdetails/Egeriadensa(058BDT)/4506
aquasabi.com /Egeria-densa
flowgrow.de /db/aquaticplants/egeria-densa
cms.agr.wa.gov /WSDAKentico/Documents/Pubs/AGR7-2507-041-ProhibitedPlantList.pdf
dnr.wisconsin.gov /sites/default/files/topic/Invasives/nr40lists.pdf
michigan.gov /invasives/id-report/prohibitedrestricted
des.sc.gov /sites/des/files/DNR/illegal.pdf
law.cornell.edu /regulations/oregon/Or-Admin-Code-SS-603-052-1200
dnr.state.mn.us /invasives/laws.html