Alternanthera reineckii is a prominent red stem plant that provides a striking color contrast in the aquascape. While it can survive in moderate conditions with greener foliage, it requires high light, CO2 injection, and a strong nutrient supply to exhibit its deepest magenta and red colorations and to prevent lower leaf loss.
Scarlet Temple At a Glance
Scarlet Temple Care and Setup
Layout Fit
Scarlet Temple usually works best from the midground into the background and needs enough room to mature at about 45 cm tall and 15 cm wide.
Water Window
Aim for freshwater conditions with a steady current, plus 20 to 28 °C, pH 5.5 to 7.5, and 2 to 12 dGH.
Upkeep Rhythm
Expect moderate growth with moderate maintenance. It usually stays easy to manage between normal maintenance sessions.
Scarlet Temple Care Guide Summary
The Scarlet Temple is a stem plant that usually works best from the midground into the background. Give it room to reach about 45 cm tall and 15 cm wide, so the mature plant still fits the layout. It tends to look its best when the light, feeding, and trimming routine stay predictable from week to week. In day-to-day care, it responds best to high light, freshwater conditions, and a steady current. It is noticeably easier to keep attractive and stable with added CO2. Keep this species within a comfortable range of 20 to 28 °C, pH 5.5 to 7.5, and 2 to 12 dGH.
Scarlet Temple Planting, Feeding & Maintenance
The Scarlet Temple does best when the setup matches the way it naturally grows. Plant it with enough room for the crown and new roots to establish cleanly. It can use both the root zone and the water column, so a balanced fertilization routine is usually the safest approach. A nutrient-rich substrate helps it settle faster and usually supports fuller growth. Keep the routine steady: high light and high nutrient demand usually give better results than big swings from week to week. This plant can also adapt to emersed growth, which is useful for growers who propagate outside the display tank.
Scarlet Temple Compatibility
Use these signals as quick context, not hard rules. They help you judge how well Scarlet Temple is likely to stay in place, tolerate curious fish, and contribute real cover in a mixed planted tank.
Aquarium Benefits
The Scarlet Temple can work very well in a mixed tank, but its value depends on how well it handles fish pressure and how much usable cover it really provides. It can be sampled by omnivores, so it fits best with tankmates that do not constantly pick at foliage. Once established, it handles average community activity reasonably well, but fresh plantings still need a little protection. It adds some usable cover without turning the layout into a dense thicket. It casts a moderate amount of shade, which is helpful when you want softer pockets of cover. Aquarists also lean on it for breaking up sight lines, shelter for fry, and shelter for shrimp, not just for appearance.
Scarlet Temple Propagation
This species is usually propagated by stem cuttings and offsets. With moderate growth and moderate upkeep, it rarely crowds neighboring plants in a hurry. That gives you a better sense of whether simple trimming is enough or whether it is smarter to plan division, replanting, or thinning before the layout closes in.
Scarlet Temple Variants
Trade names and cultivated forms do not always change how a plant behaves in the tank. The notes below call out the differences that actually matter in care and layout planning, while anything not mentioned still follows the base profile.
Mini
A compact, dwarf cultivar of Alternanthera reineckii that stays significantly shorter and bushier. It is ideal for the foreground or midground and can form a dense red carpet when provided with intense lighting and CO2.
This form is most often used from the foreground into the midground and stays around 10 cm tall and 10 cm wide. Compared with the base plant, it leans toward slow growth and high maintenance. In the aquarium, expect high cover density.
Also known as: AR Mini, Alternanthera reineckii mini
Frequently Asked Questions About Scarlet Temple
Is Scarlet Temple a good beginner aquarium plant?
It sits somewhere in the middle. As a intermediate species with moderate maintenance needs, it is a better fit once you already have the basics of light, feeding, and trimming under control.
Where should Scarlet Temple be placed in an aquarium?
This plant usually looks best from the midground into the background. At full size it can reach about 45 cm tall by 15 cm wide, so leave room for it to mature. It is best rooted into the substrate.
Does Scarlet Temple need strong light or CO2?
For the best results, provide it with high lighting. Additionally, it is noticeably easier to keep attractive and stable with added CO2.
What water conditions suit Scarlet Temple?
Aim for freshwater conditions, a steady current, and a range around 20 to 28 °C, pH 5.5 to 7.5, and 2 to 12 dGH to keep this species inside its comfort zone.
How does Scarlet Temple spread or help the aquarium?
It is usually propagated by stem cuttings and offsets. In the display tank, aquarists value this plant for breaking up sight lines, shelter for fry, and shelter for shrimp.
Plants That Grow Well With Scarlet Temple
These plants share compatible water parameters and growth habits with Scarlet Temple, making them reliable companions in a shared aquascape.
Cylindric Ludwigia
Ludwigia glandulosa
Bonsai Rotala
Rotala indica
Glosso
Glossostigma elatinoides
Downoi
Pogostemon helferi
Dwarf Hairgrass
Eleocharis parvula
Bog Moss
Mayaca fluviatilis
Side-by-side comparisons for Scarlet Temple
These guides compare Scarlet Temple directly with another plant, helping you choose between similar roles, care needs, and layout tradeoffs.
Creeping Jenny
Lysimachia nummularia
Creeping Ludwigia
Ludwigia repens
Cylindric Ludwigia
Ludwigia glandulosa
Bog Moss
Mayaca fluviatilis
Anacharis
Egeria densa
Baby Tears
Lindernia rotundifolia
Fish That Suit Scarlet Temple
These fish pair well with Scarlet Temple based on shared water preferences and temperament, helping you build a balanced tank around this plant.
Lemon Tetra
Hyphessobrycon pulchripinnis
X-Ray Tetra (Pristella)
Pristella maxillaris
Serpae Tetra
Hyphessobrycon eques
Odessa Barb
Pethia padamya
Twig Catfish (Farlowella)
Farlowella acus
Mosquitofish (Gambusia)
Gambusia affinis
Related plant profiles
These cards open plant profiles directly. They are chosen by overall care, layout, and growth-pattern similarity, rather than a side-by-side comparison guide.
Orchid Lily
Barclaya longifolia
Barclaya longifolia, commonly known as the Orchid Lily, is an elegant bulbous aquatic plant native to Southeast Asia. It features long, undulating, ribbon-like leaves that can display striking shades of olive green to vibrant red, often with bright pink or red undersides. Known for its delicate foliage, it requires a nutrient-rich substrate and may occasionally enter a natural resting phase where it sheds its leaves. It is highly prized by aquascapers for midground to background placement but needs protection from herbivorous fish and snails due to its highly palatable, fragile leaves.
Wendtii Crypt
Cryptocoryne wendtii
Cryptocoryne wendtii is one of the most popular and adaptable rosette plants in the aquarium hobby. Commonly traded in color varieties such as 'Red', 'Green', and 'Brown' (which share identical care and sizing), it forms deep, robust roots and thrives in a wide range of water parameters. While prone to 'crypt melt' when first introduced to new water chemistry, it recovers quickly from its established root system.
Creeping Ludwigia
Ludwigia repens
A classic, highly adaptable stem plant known for its oval leaves that develop attractive reddish hues under good lighting. It is one of the easiest red plants to grow in the aquarium, making it a popular choice for beginners looking to add contrast to their aquascape.
Cylindric Ludwigia
Ludwigia glandulosa
Ludwigia glandulosa is a striking, deep red to purple stem plant. Unlike many other Ludwigia species, its leaves grow alternately along the stem rather than in opposite pairs. It is a demanding plant that requires high light intensities, nutrient-rich conditions, and CO2 injection to maintain its vibrant coloration and prevent the shedding of lower leaves.
Glosso
Glossostigma elatinoides
Glossostigma elatinoides, commonly known as Glosso, is a classic and highly popular aquarium carpeting plant native to the swamps and bogs of Australia and New Zealand. Prized for its ability to form a dense, bright green mat along the aquarium floor, it is often a centerpiece in high-tech nature aquariums. It is a demanding plant that requires intense lighting and carbon dioxide supplementation to creep horizontally; without these, it tends to grow leggy and vertical. Frequent trimming is necessary to prevent the carpet from overgrowing itself, which can lead to the lower layers dying off and the mat detaching from the substrate.
Ashy Pipewort
Eriocaulon cinereum
Eriocaulon cinereum is a striking, hedgehog-like rosette plant that is highly sought after by advanced aquascapers. Originating from marshy areas and rice paddies in Asia and Australia, it demands intense lighting, high CO2 injection, soft acidic water, and a nutrient-rich substrate to thrive. It develops an extraordinarily large root system relative to its size, requiring deep and rich aquasoil. Due to its rigid but delicate crown and strict parameter demands, it is recommended only for experienced hobbyists.