Water Violet

Hottonia palustris

Plantae›Tracheophyta›Magnoliopsida›Primulaceae

📍 Europe & Western Asia

Stunning cold-water stem plant with whorls of feathery leaves. One of the most beautiful temperate aquarium plants. Challenging to keep in tropical tanks — prefers cool, clear, well-oxygenated water.

Tank Mates

Otocinclus

Small, peaceful algae grazers that won't damage delicate foliage and thrive in cool, well-oxygenated water

excellent

Emerald Dwarf Rasbora

Tiny, gentle schooling fish that prefer cool temperatures and won't uproot or consume the plant

good

Red Cherry Shrimp

Peaceful invertebrates that clean algae without damaging plants and tolerate cool water conditions

excellent

Hornwort

Complementary cold-water stem plant with similar care requirements; creates natural-looking planted layout

excellent

Java Fern

Hardy cold-water plant that pairs well with Water Violet; both thrive in cool, clear, well-lit tanks

excellent

White Cloud Mountain Minnow

Temperate fish species that prefer cool water (5–18°C) and won't disturb delicate plant structure

excellent

Common Diseases

Nutrient Deficiency

Symptoms

Yellowing leaves, stunted growth, pale coloration, leaf holes or necrotic spots

Treatment

Increase fertilizer dosing (macros and micros); ensure substrate is nutrient-rich; test water parameters and adjust CO₂ if needed

Algae Overgrowth (Green Spot, Black Beard)

Symptoms

Green or black algae coating leaves and stems, reduced photosynthesis, plant decline

Treatment

Reduce light duration to 8–10 hours daily; increase water changes; add algae-eating shrimp or fish; improve water circulation

Melting (Decay)

Symptoms

Leaves become translucent, mushy, or dissolve; stems rot; rapid plant deterioration

Treatment

Improve water quality with frequent changes; ensure adequate CO₂ and lighting; remove decaying tissue; check for poor water circulation or temperature stress

Bacterial Infection

Symptoms

Soft, mushy stems; foul odor; rapid decay of new growth; leaf discoloration

Treatment

Remove affected plant parts immediately; increase water changes; ensure excellent water circulation and oxygenation; maintain cool, stable temperatures