Fine-leaved Pondweed

Potamogeton gayi

Plantae›Tracheophyta›Magnoliopsida›Potamogetonaceae

📍 South America & Europe

Elegant plant with very fine, grass-like submerged leaves. Creates a soft, wispy texture perfect for natural-style aquascapes. Tolerates cool water well and can be used in temperate tanks.

Tank Mates

Amano Shrimp

Gentle algae grazers that won't damage delicate foliage and benefit from the plant's shelter

excellent

Red Cherry Shrimp

Small, non-destructive shrimp that graze on biofilm without harming fine leaves

excellent

Ember Tetra

Peaceful small fish that appreciate the plant's cover without uprooting or consuming it

good

Otocinclus

Algae-eating fish that respect plant structure and help maintain tank cleanliness

good

Dwarf Hairgrass

Compatible foreground plant with similar nutrient requirements and non-competitive growth

excellent

Anubias Nana

Low-light companion plant that complements the fine-leaved texture in midground/background layouts

excellent

Common Diseases

Nutrient Deficiency

Symptoms

Yellowing leaves, stunted growth, pale coloration, leaf holes or transparent patches

Treatment

Increase liquid fertilizer dosing, verify CO2 levels are adequate (30-40 ppm), and ensure substrate contains nutrients. Test water parameters and adjust macro/micronutrient balance accordingly

Algae Overgrowth

Symptoms

Green, brown, or black algae coating leaves; reduced light penetration; plant appears smothered

Treatment

Reduce lighting duration to 8-10 hours daily, increase water changes (25-30% weekly), add algae-eating shrimp or fish, and ensure CO2 and nutrient balance favor plant growth over algae

Melting (Tissue Decay)

Symptoms

Leaves become translucent, mushy, or dissolve; plant appears to shrink rapidly

Treatment

Improve water quality with frequent partial water changes, verify temperature is within 23-28°C, increase CO2 and lighting gradually, and remove severely damaged portions to prevent rot spread

Poor Growth

Symptoms

Minimal new leaf development, leaves remain small, plant appears stalled

Treatment

Confirm lighting is medium-high (8-10 hours daily), increase CO2 supplementation, boost fertilizer dosing, and ensure substrate is nutrient-rich; allow 4-6 weeks for recovery