Planted aquariums for beginners: easy plants, lighting, fertiliser and algae
TUREFF• •0
Live plants make an aquarium look natural and they help it too: they use up nitrate, compete with algae and give fish cover. A planted tank does not have to be a high-tech project. With the right plants, a modest light and a little patience, beginners can keep a lush tank without pressurised CO2 or complicated dosing.
Easy plants to start with
These are widely kept, tolerant plants that grow under ordinary lighting:
- Java fern and anubias: tough, slow-growing plants that should be tied or glued to rock or wood rather than buried. Burying their rhizome (the thick horizontal stem) can make it rot.
- Java moss: grows on almost anything and gives small fish and fry cover.
- Cryptocorynes: rooted plants for the foreground and midground. They often "melt" back after planting and then regrow, so do not give up on them.
- Amazon swords: a larger rooted plant that appreciates root tabs in the substrate.
- Floating plants, such as frogbit or salvinia: fast growers that soak up nutrients and shade out algae. Keep them thinned so they do not block all the light.
- Fast-growing stem plants, such as hygrophila: useful early on because they take up nutrients quickly.
Buy healthy plants and rinse them before planting, checking for snails and their eggs if you do not want them.
Lighting basics
Light drives plant growth, and also algae growth.
- Easy, low-light plants do not need a powerful light. A light designed for planted tanks is helpful but need not be the strongest available.
- Keep a consistent photoperiod, often somewhere around six to eight hours a day for a new tank, using a timer. Longer is not better; excess light without enough nutrients is a classic cause of algae.
- Keep the tank out of direct sunlight.
Fertilisers
Plants need nutrients beyond what fish waste provides.
- Liquid fertilisers feed plants that take nutrients from the water, such as java fern, anubias, moss and stem plants.
- Root tabs are pushed into the substrate for heavy root feeders like swords and cryptocorynes.
- A nutrient-rich substrate helps rooted plants, though it usually still needs topping up with tabs over time.
Follow the product instructions and start at the lower end of the dose, especially if you keep shrimp or snails.
CO2: do you need it?
Plants use carbon dioxide to grow. Pressurised CO2 systems produce fast, dense growth, but they need careful adjustment, since too much CO2 can harm fish, and they come with extra cost and maintenance. For a beginner's low-tech tank with easy plants, it is not necessary. Liquid carbon products exist as an alternative; read the instructions carefully, as some plants and animals are sensitive to them.
Dealing with algae
Every tank has some algae. Problems come from an imbalance, usually too much light or too many nutrients compared with what plants can use.
- Reduce the light period first; it is the easiest lever.
- Do regular water changes and avoid overfeeding fish.
- Add more plants, especially fast growers and floating plants, to compete for nutrients.
- Remove algae by hand: wipe the glass, scrub decorations and trim affected leaves.
- Algae-eating animals, such as some snails, shrimp or small algae-eating fish, can help, but they do not fix the underlying cause.
- Be patient with a new tank. Algae blooms are common in the first weeks while everything settles.
Change one thing at a time and give it a week or two before judging, so you know what worked.
Describe your planted tank and what grows well for you, or ask about a plant that is not thriving, in the comments below.