Rotala

Rotala sp.

Plantae›Tracheophyta›Magnoliopsida

📍 South Asia

A large genus of fast-growing stem plants widely used in aquascaping for their fine, needle-like to rounded leaves and tendency to display brilliant red, pink, and orange coloration under high light and CO2 injection. Rotala species are excellent nutrient consumers that help control algae, but most species require medium to high light and CO2 supplementation to achieve their best coloration and compact growth.

Tank Mates

Amano Shrimp

Excellent algae control without damaging plant tissue; active foragers that complement Rotala's nutrient-consuming benefits

excellent

Red Cherry Shrimp

Small, peaceful invertebrates that will not uproot or consume Rotala; thrive in planted tanks with similar water parameters

excellent

Otocinclus

Algae-eating fish that remain small and gentle; prefer heavily planted tanks and will not damage Rotala stems

excellent

Neon Tetra

Small, peaceful schooling fish that add visual interest without uprooting plants or competing for nutrients

good

Dwarf Gourami

Calm, mid-water swimmers that appreciate dense plant cover; generally ignore plant matter

good

Bucephalandra

Excellent companion plant with similar care requirements; creates diverse hardscape-bound plant layout

excellent

Common Diseases

Nutrient Deficiency (Nitrogen, Iron, or Macronutrients)

Symptoms

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

Treatment

Increase fertilizer dosing frequency and ensure all-in-one or comprehensive fertilizer is used; verify adequate lighting and CO2; perform 25-30% water changes weekly to reset nutrient baseline

Algae Overgrowth (Green Spot, Black Beard, or Hair Algae)

Symptoms

Visible algae coating on leaves and stems, reduced plant vigor, plant tissue becoming obscured

Treatment

Increase water column nutrient uptake by boosting CO2 and fertilizer; reduce photoperiod to 8-10 hours daily; introduce algae-eating fish or shrimp (Amano Shrimp, Otocinclus); perform manual removal and increase water change frequency

Melting or Tissue Decay

Symptoms

Sudden leaf loss, mushy or translucent stems, foul odor from substrate, plant collapse

Treatment

Improve water circulation with increased aeration; perform 50% water change immediately; remove affected plant portions; check for ammonia or nitrite spikes and address root cause; ensure temperature is within 23-28°C range

CO2 Deficiency or Poor Gas Exchange

Symptoms

Slow growth, pale leaves, loss of red coloration despite adequate light, plant appears stunted

Treatment

Inject pressurized CO2 at 1-2 bubbles per second or use liquid carbon supplements; improve water surface agitation for gas exchange; verify light intensity is 8-10 hours daily at 60+ PAR; check that water parameters (pH 6.0-7.0) support CO2 dissolution