Guide
Live plants vs fake plants
Pros and cons for water quality, algae, and maintenance.
- Live plants improve water quality: they absorb nitrate, phosphate, and ammonia, produce oxygen, and outcompete algae for nutrients - fake plants do none of this.
- Fake plants are genuinely low-maintenance: no light requirements, no fertiliser, no dying, no algae growing on them - a reasonable choice if your setup or schedule doesn't support live plants.
- Easy live plants exist: Anubias, java fern (Microsorum pteropus), hornwort (Ceratophyllum demersum), and floating plants like salvinia need minimal light and no CO₂ injection.
- Fake plants can injure fish: sharp-edged plastic tears fins - silk or soft-plastic designs are far safer, especially for bettas and fancy goldfish.
- Mixing both is practical: a few hardy live plants for biological benefit, silk plants for extra structure where live plants would struggle.
- Light is the bottleneck for live plants: most budget tank lids don't provide enough. Know what you're working with before buying plants.
What live plants actually do for your tank
Live plants are not just decoration. They are active participants in your tank's chemistry. Through photosynthesis, they consume CO₂ and release oxygen during daylight hours. More practically for water quality, they absorb ammonia, nitrite, nitrate, and phosphate - the same compounds that drive algae blooms and stress fish.
In a well-planted tank, nitrate accumulation between water changes is noticeably slower. That doesn't mean you can skip water changes - you can't - but plants do take meaningful pressure off your filter. If you're not confident about how nitrate builds up in the first place, the guide on the nitrogen cycle explains the mechanics clearly.
Plants also provide physical cover. Fish that feel exposed are stressed fish. Hiding spots reduce aggression in community tanks, encourage shy species to come out more (paradoxically), and give breeding fish the privacy they need to actually spawn. A bare tank with nowhere to retreat looks clean to you and looks terrifying to a small fish.
Live plants won't fix a tank that's overstocked or undercycled. They help with nitrate at the margins - a heavily planted tank might halve your nitrate rise between water changes, but they won't absorb the output of 30 fish crammed into a 60-litre tank. Get your cycle right and stock sensibly first.
Easy live plants that actually work for beginners
Most guides list easy plants and then describe care requirements that are only "easy" if you already know what you're doing. Here's an honest breakdown.
Anubias
Anubias barteri and its varieties are genuinely beginner-proof. They grow slowly, survive low light (as little as 15-20 lumens per litre), and tolerate a wide temperature range of 22-28°C (72-82°F). The one thing you must not do is bury the rhizome - the thick horizontal stem - in substrate. Tie it to wood or rock instead. Buried rhizomes rot.
Java fern
Microsorum pteropus is almost indestructible. Same rule as anubias: attach it to hardscape, never plant it. It reproduces by growing tiny plantlets on the edges of mature leaves, which eventually detach and root themselves. Needs minimal light and no fertiliser in most established tanks.
Hornwort
Ceratophyllum demersum is a fast-growing stem plant that competes aggressively with algae for nutrients - one of the best plants for cycling tanks and new setups. You can plant it or let it float. It sheds needles constantly, which some people find annoying. It also doesn't like being disturbed once settled.
Floating plants
Salvinia, frogbit (Limnobium laevigatum), and duckweed (Lemna minor) are exceptionally effective at pulling nutrients from the water column. They need surface light, which most tanks have. The warning with duckweed specifically: it multiplies extremely fast and is almost impossible to fully remove once introduced. Salvinia is easier to manage.
Vallisneria and amazon swords
Both are popular, both need more light than the species above - around 30+ lumens per litre - and amazon swords (Echinodorus spp.) need a nutrient-rich substrate or root tabs to do well long-term. These are intermediate plants dressed up as beginner ones in a lot of guides.
Buying plants based on what looks good at the shop, not what matches your light. A plant that needs moderate-to-high light will slowly melt and die under a basic LED hood - it won't die overnight, it'll just decline over weeks until you can't figure out what went wrong. Check your light output before you buy.
What you actually need to keep live plants
Light
This is the single most common reason live plants fail. Budget aquarium kits - the all-in-one setups marketed at beginners - often include lights that are adequate for visibility but too weak for plant growth. Low-light plants like anubias and java fern can manage with these. Anything else probably can't.
A rough guide: low-light plants need around 10-20 lumens per litre. Medium-light plants need 20-40. High-light plants (most carpet plants, glossostigma, etc.) need 40+ lumens per litre and usually CO₂ injection too. Photoperiod matters as well - 8 hours is the standard starting point. More than 10 hours without enough light intensity just grows algae.
Substrate
Java fern, anubias, and floating plants don't care about substrate because they feed from the water column or don't root in the ground at all. Root-feeding plants like amazon swords and crypts benefit from nutrient-rich substrate - either purpose-made aquatic soil (like ADA Aqua Soil or Fluval Stratum) or inert gravel supplemented with root tabs.
Fertiliser
An established, moderately stocked tank often has enough nutrients from fish waste to sustain low-light plants without adding anything. Heavily planted tanks or fast-growing species may need a liquid fertiliser. The one to watch is iron - most liquid ferts cover macros (nitrogen, phosphorus, potassium) but you may need a separate iron supplement if plants show yellowing between leaf veins.
CO₂
You don't need it for easy plants. CO₂ injection is for serious planted tank setups running high light - it's expensive, requires regular maintenance, and drops pH if not managed carefully. For a standard community tank with java fern and some floaters, ignore CO₂ completely.
If you're logging water parameters already, track your nitrate readings before and after adding live plants. You'll often see a measurable drop in the rate of nitrate accumulation within a few weeks of planting - it's one of the more satisfying experiments you can run on your own tank. App-aquatic's parameter log makes this easy to see over time.
The honest case for fake plants
Fake plants get dismissed by experienced hobbyists, and that's somewhat unfair. There are genuinely good reasons to use them.
If you keep goldfish, they'll eat most live plants - and goldfish tanks run cold (18-22°C / 64-72°F) and often have high bioloads that make planted tanks harder to maintain anyway. Fake plants in a goldfish tank are a sensible, practical choice. Same logic applies to large cichlids that uproot or destroy plants, or to tanks where the light genuinely isn't good enough.
For new fishkeepers who haven't yet learned water chemistry and tank maintenance, removing one variable (plant care) is reasonable. Get the fish side stable first.
The other legitimate use: filling out a tank's structure without the commitment. Live plants take weeks to establish. Silk plants give you the visual cover and hiding spots immediately, on day one.
Cheap plastic plants with hard, sharp edges are a real risk for fish with flowing fins - bettas, fancy guppies, angels, fancy goldfish. A torn fin is an entry point for bacterial and fungal infection. If you use artificial plants, run your hand along the edges. If it feels rough or sharp to your palm, it'll damage fins. Silk plants or softer plastics are significantly safer.
Algae: how plants help (and where people go wrong)
Live plants compete with algae for the same resources: light, CO₂, nitrate, phosphate, and iron. A densely planted tank with fast-growing plants will often have noticeably less algae than a sparsely planted or unplanted tank, because the plants are winning the nutrient race.
But this only works if the plants are actively growing. Struggling, melting, or dying plants release nutrients back into the water as they decompose - which feeds algae rather than outcompeting it. A few healthy, growing easy plants will do more for algae control than a tank full of slow-dying ones.
Floating plants are particularly effective here because they intercept light from above, shading the water column, and have direct access to surface CO₂. If you have persistent green water or film algae, adding salvinia or frogbit is one of the fastest biological fixes available.
More than 10 hours of light without matching intensity typically promotes algae rather than plant growth - start at 8 hours and adjust based on results.
Mixing live and fake plants
There's no rule that says you have to choose. A hybrid approach - a few easy live plants where they'll thrive, silk or soft-plastic plants where they won't - is genuinely sensible for most hobbyists.
A practical layout: anubias or java fern attached to driftwood in the middle and background, floating salvinia at the surface, and silk plants filling out corners or areas with poor light penetration. You get the water quality benefits from the live plants, the visual structure from the artificial ones, and a manageable maintenance load.
What doesn't make sense is spending money on live plants, putting them in the wrong conditions, watching them die, and then deciding live plants "don't work." That's a setup problem, not a plant problem.
The aquarium trade has a financial interest in selling you high-maintenance planted tank setups - specialist substrates, CO₂ systems, expensive lights, liquid fertilisers. That's a legitimate and rewarding part of the hobby if you want to pursue it. But you can have a healthy, attractive, well-planted tank with java fern, anubias, and some floating plants in a basic setup with decent lighting. Don't let complexity put you off live plants entirely.
Practical maintenance: what each actually requires
Live plants
Trim stem plants and fast-growing species when they get leggy or block light to lower plants. Remove dead or yellowing leaves promptly - rotting plant matter adds to nutrient load. Floating plants may need thinning weekly in a well-lit tank. Slow-growing species like anubias and java fern need almost nothing beyond occasionally wiping algae off their leaves with a soft cloth.
During water changes, siphon around the base of rooted plants without disturbing roots. Check that anchored plants haven't come loose. Regular water changes remain essential even in planted tanks.
Fake plants
Remove them during water changes and rinse under tap water if they've accumulated dust or algae. A soft toothbrush removes stubborn algae. Don't use soap or detergent - residue is toxic to fish. Check periodically that they haven't developed sharp edges from chips or cracks, and replace any that have.
Which should you choose?
If your light is adequate (even for low-light species) and you're willing to do occasional trimming: start with live plants. Anubias, java fern, and floating plants are genuinely easy and deliver real benefits to your tank's biology. Check the water parameters guide to understand what you're measuring and why plants help.
If your tank runs very cold or very warm for most plants, you have fish that eat or destroy plants, your lighting is inadequate and you can't upgrade it, or you simply want a zero-maintenance visual setup: fake plants are a legitimate choice. Use silk or soft-plastic designs and check for sharp edges.
If you're stocking the tank for the first time, use the free stocking calculator alongside your plant decisions - a heavily stocked tank produces more nitrate and puts more pressure on plants to perform.
Track your parameters and get care reminders with App-aquatic.
Get the free appCan I add live plants to an already-established tank?
Yes, and it's often easier than planting a new setup. An established tank has nutrients in the substrate and water column that new plants can use immediately. Rinse plants before adding them to avoid introducing snails or algae. Attach rhizome plants to hardscape rather than burying them, and float stem plants for a few days before planting to let them adjust.
My live plants are melting. Is that normal?
Partially, yes. Many aquatic plants are grown emersed (above water) in nurseries and will shed their aerial leaves when submerged - new, underwater-adapted leaves grow back within a few weeks. This is normal for crypts in particular (often called "crypt melt"). If a plant is melting and producing no new growth after 4-6 weeks, the problem is likely light, nutrients, or water parameters rather than adjustment.
Do live plants cause ammonia spikes when they die?
Rotting plant material does decompose and add to ammonia load, but a few dead leaves won't cause a crisis in a cycled tank. The risk is real if you add a large amount of plants that subsequently all die and decompose at once - for example, buying a lot of high-light plants for a low-light setup. Remove dead or decaying plant matter promptly during water changes.
Will live plants reduce algae?
Healthy, actively growing live plants compete with algae for nutrients and light and do reduce algae over time - especially fast-growing species like hornwort and floating plants. They won't eliminate algae on their own, and struggling or dying plants can make
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