The plant selection rule
The single most important rule in planted tank success: match plants to your equipment, not your equipment to your plants. A new keeper who buys a CO₂-dependent carpet plant because it looked nice in a YouTube video is setting themselves up for failure. The plant will stall, turn yellow, and rot. Not because the keeper did anything wrong, but because the plant was wrong for the tank.
Start with what your setup can support. Upgrade later if you want different plants.
Low-tech starter list (no CO₂)
These plants thrive without CO₂ injection under modest lighting. They’re the foundation of any first planted tank.
- Java Fern (Microsorum pteropus). Rhizome plant, attaches to hardscape, doesn’t root in substrate. Multiple varieties (standard, Windelov, trident).
- Anubias (barteri, nana, coffeefolia, gold). Slow-growing rhizome plant with broad green leaves. Attaches to wood or rocks. Can live 20+ years.
- Cryptocoryne (wendtii, parva, lucens, spiralis). Root-feeder with colorful leaves (green, brown, red). “Melts” when first introduced; grows back from rhizome.
- Amazon sword (Echinodorus species). Large centerpiece plant. Heavy root feeder, so it needs root tabs or active substrate. Grows large over 1–2 years.
- Vallisneria (spiralis, americana). Tall grass-like plant, spreads via runners. Excellent for background.
- Mosses (Java moss, Christmas moss, Flame moss, Susswassertang). Grow on hardscape, provide grazing surface for shrimp, tolerate low light.
Medium-tech additions (better light, no CO₂ required)
Plants that do well with stronger lighting but don’t require CO₂. Supplementing with liquid carbon (Excel, Metricide) helps them thrive.
- Bacopa (caroliniana, monnieri). Classic stem plant, tolerates a wide range.
- Limnophila sessiliflora. Fast-growing stem, useful for soaking up excess nutrients in new tanks.
- Hygrophila (polysperma, pinnatifida). Bullet-proof stem plant, grows fast.
- Rotala rotundifolia. One of the few Rotala species that handles low-tech; develops pink tips under strong light.
- Ludwigia repens. Stem plant with green/bronze/pink tones; redder with more light and CO₂.
- Dwarf Sagittaria. Grass-like plant that forms a background wall; tolerates low-tech but benefits from more light.
High-tech only (CO₂ required)
These species need CO₂ injection to look the way they do in photos. Attempting them in low-tech results in stunted, pale, stringy versions that usually rot within months.
- Carpeting plants: Monte Carlo (Micranthemum tweediei), dwarf hairgrass (Eleocharis parvula), HC Cuba (Hemianthus callitrichoides), Glossostigma
- Aggressive reds: Rotala H’ra, Ludwigia Red Hill, Ammania gracilis, Alternanthera reineckii
- Bucephalandra. Some species tolerate low-tech; most want CO₂ for best coloration.
- Demanding stems: Pogostemon helferi, most Rotala species beyond rotundifolia
- Pantanal-type plants. Stem plants from soft acidic water regions; require careful chemistry.
Where to buy plants
Specialty online retailers (Aquarium Co-Op, Buce Plant, Glass Aqua, H2O Plants) sell higher-quality plants than most big-box pet stores. Plants arrive larger, healthier, and cleaner (less likely to introduce snails or algae).
Local fish stores vary widely. A good LFS with a dedicated plant section is as good or better than online; a generic pet store with a few plants in the back is almost always worse quality than ordering online.
Avoid tissue culture cups for first tanks unless you’re experienced. These plants are grown emersed (out of water) in sterile gel and have to convert to submerged growth, which causes a dieback period first-time keepers often misdiagnose as a sick plant.
Planting technique
Substrate plants: remove from pot, rinse, trim old/damaged roots, plant with tweezers. Leave leaf crown above substrate; bury roots.
Rhizome plants (Anubias, Java Fern, Buce): attach to hardscape with super glue gel or fishing line. DO NOT bury the rhizome. It will rot.
Stems: trim the bottom 1/4 inch, plant with tweezers, spaced about 1 inch apart.
Moss: tie to hardscape with thread or fishing line. Mesh gardening may be easier for beginners than free-floating clumps.