Water Sprite Aquarium Plant: Care, Planting and Floating Guide (India)

Water sprite (Ceratopteris thalictroides), also called Indian fern or water fern, is a fast-growing, feathery aquarium fern that can be planted or left floating, grows in low to medium light without CO2, soaks up nitrate and ammonia that feed algae and makes new baby plants on its own leaves, which makes it one of the most useful beginner plants for Indian tanks. It is also a good cover for fry and shrimp, and a quick way to shade a tank with too much light. This guide covers how to grow water sprite planted and floating, light and water, fertilizer, trimming, propagation from plantlets, common problems such as melting and yellowing, and which fish suit it.

Water sprite at a glance

Why water sprite suits Indian aquariums

Water sprite is a tropical fern that grows well in warm water, so it is comfortable in most Indian homes without a heater in summer. It tolerates tap water, does not need CO2 and grows quickly, which makes it suitable for new tanks that need nutrient uptake while the bacteria colony settles. Its feathery leaves give fry and shrimp cover, and a floating mat of water sprite shades the tank and makes shy fish bolder. Compare it with other beginner plants in our beginner aquarium plants guide, floating plants guide and fastest growing aquarium plants article.

Planted or floating: which should you choose?

Many keepers do both: plant a few stems for the green background and leave a few floating to shade a corner. If you float it, thin the mat each week so that plants below still get light; see the duckweed guide for another floating plant that spreads quickly.

Light and CO2

Low to medium light for 7-8 hours a day is enough. In strong light it grows faster but can catch algae if nutrients are unbalanced. See our planted aquarium lighting guide and how many hours to run an aquarium light. For 1-2 foot tanks the Sobo AL-380 (15.5W) (₹1,230) works well, and for nano tanks the Neo Helios Nano S3 Plus (₹1,050) is a good fit. Water sprite does not need CO2; see our low-tech planted tank guide.

Sobo AL-380 (15.5W)Planted tanks, 1-2 ft Neo Helios Nano S3 Plus13W full spectrum

Planted tank lights by tank size (Fish Bazaar range)

Pick the row that matches your tank length, then choose by plant level: the cheaper full-spectrum lights suit low to medium light plants such as Anubias, Java fern and Cryptocoryne, while the Chihiros WRGB II Pro and B Series are built for red plants, carpets and CO2 tanks. Tank length is the longest side of the glass. Prices are in rupees as listed on Fish Bazaar on 9 October 2026 and can change, so check the product page for the current price and stock.

Chihiros sizes (30, 45, 60, 80, 90, 120) match the tank length in cm. Wattage alone does not decide plant growth, so match the light to your plants and add CO2 and fertilizer only if you want demanding species. Not sure which light fits your tank? See the full aquarium light range or message us with your tank size.

Water, temperature and fertilizer

Water sprite likes warm water between about 22 and 28 C and soft to moderately hard water. It feeds through the leaves and the roots, so a weekly dose of an all-in-one such as Sunken Garden Green (₹490) and a root tab such as Sunken Garden Root Tabs (₹290) for planted plants keep it healthy. Because it grows fast and absorbs nutrients, it can strip a lightly fertilized tank quickly, and pale leaves usually mean it needs more. Use a conditioner such as Sunken Garden Anti Chlorine (₹290) on water changes. Read the aquarium plant fertilizer guide, how to dose aquarium fertilizer and water conditioner guide for details.

Sunken Garden GreenAll-in-one plant fertilizer Sunken Garden Root TabsRoot fertilizer, 6+1 pack Sunken Garden Anti ChlorineWater conditioner

How to plant or float water sprite

1. Rinse the plant and quarantine it; see how to dip and quarantine new plants.
2. Remove any weights, bands or rockwool.
3. To plant it, push the roots 2-3 cm into the substrate and keep the crown above it.
4. To float it, place the plant on the surface and let the roots hang down.
5. Space planted stems 5-10 cm apart so that the leaves can spread.
6. Keep the light steady and remove loose leaves with a net.

See how to plant aquarium plants for other methods and plant holders, pots, weights and glue for tools.

Propagating water sprite from plantlets

Water sprite produces tiny baby plants along the edges of mature leaves. When a plantlet has its own roots and two or three leaves, pinch it off with tweezers and plant it or float it. You can also cut a whole leaf with plantlets and lay it on the surface. This is one of the easiest ways to multiply a plant, and a single bunch can fill a tank in a couple of months. See how to propagate aquarium plants for other methods and how to grow aquarium plants faster for tips on speeding growth.

Trimming and controlling growth

Because water sprite grows quickly, trim it every week or two. Cut older outer leaves at the base and remove surplus plantlets. Thin floating mats so that a third of the surface stays open, which lets oxygen enter and allows light to reach plants below. Give plantlets to friends or dry unwanted plants in household waste; never throw them into a drain, pond or river, because a fast-growing plant can spread in natural water. See our aquarium plant maintenance guide for a routine.

Water sprite for fry, shrimp and bettas

The fine leaves and long roots of floating water sprite give fry and shrimp places to hide, and the surface cover helps shy fish settle. Livebearers use the roots as nurseries, and bettas rest under the leaves. Remove dead leaves quickly in small tanks, because rotting plant matter lifts ammonia. For betta tanks, see aquarium plants for betta fish and betta care, and for shrimp tanks, shrimp care.

Using water sprite in your layout

Plant water sprite along the back and sides, where its height gives the tank depth, or leave a few plants floating in a corner. Combine it with slower plants such as Anubias and Java fern at the front, because water sprite will shade them if you do not trim. Its bright green fronds contrast well with darker plants and red plants; see red aquarium plants and our aquascaping guide.

Common water sprite problems and fixes

See why aquarium plants melt or turn brown and yellow and nutrient deficiency in aquarium plants for more help.

Which fish and tanks suit water sprite

Water sprite suits community, livebearer, nano, shrimp and betta tanks. Goldfish and large cichlids may eat the soft leaves, though a fast-growing plant often keeps up. See guppy care, goldfish care and cichlid care. For other plant-safe choices, read best fish for a planted aquarium.

Choosing healthy water sprite

Look for fronds with bright green, firm leaves and thick white roots. Avoid plants with black, translucent or slimy patches. Plants often arrive with some damaged outer leaves, which is normal; remove them and keep the centre. Because water sprite is fragile in transit, unpack it as soon as it arrives and plant or float it the same day.

Buying water sprite in India

Water sprite is sold as bunches, potted plants and floating plants, and is among the cheaper aquarium plants. Ask the seller whether the plant was grown submerged or emersed, since submerged plants adapt faster; see where to buy live aquarium plants in India and tissue culture plants. At the time of writing, Fish Bazaar does not list live water sprite on the store; we stock the lights, fertilizers, root tabs and conditioners shown above, and you can message us on WhatsApp for help planning your tank.

हिंदी में संक्षेप: वॉटर स्प्राइट (इंडियन फ़र्न) तेज़ी से बढ़ने वाला फ़र्न है जो कम से मध्यम रोशनी में चलता है और CO2 नहीं माँगता। इसे मिट्टी में लगाएँ या पानी पर तैरने दें। पानी 22-28 डिग्री रखें, हफ़्ते में थोड़ी तरल खाद दें और हर 1-2 हफ़्ते में छँटाई करें। पत्तियों पर बनने वाले छोटे पौधों से नया पौधा बन जाता है। यह फ्राई और झींगा के लिए अच्छी छाया देता है। छँटाई का कचरा कभी नाली, तालाब या नदी में न डालें।

Frequently asked questions

Is water sprite easy to grow?

Yes. It grows in low to medium light, needs no CO2 and tolerates tap water. It grows fast in warm water.

Can water sprite float?

Yes. Floating plants grow broader leaves and make more plantlets, but a thick mat blocks light for plants below.

How do you plant water sprite?

Push the roots 2-3 cm into the substrate and keep the crown above it. Space plants 5-10 cm apart.

How does water sprite reproduce?

It grows baby plantlets along the leaf edges. Pinch off a plantlet with roots and plant or float it.

Why is my water sprite melting?

Plants grown above water often melt as they adapt. Keep conditions steady and new fronds will appear.

Does water sprite need fertilizer?

A weekly dose of all-in-one fertilizer and a root tab for planted plants keep it healthy. Pale leaves mean low nutrients.

Does water sprite reduce algae?

It absorbs nitrate and ammonia that feed algae, but it does not remove existing algae by itself.

Can goldfish eat water sprite?

Goldfish may nibble the soft leaves, but a fast-growing plant often recovers. Float it out of reach in a tank with large fish.

How often should I trim water sprite?

Every one to two weeks. Cut older outer leaves and remove surplus plantlets.

Is water sprite good for fry and shrimp?

Yes. The fine leaves and roots give cover to fry and shrimp, especially when floating.

Related plant guides

• Aquarium plants for fish tanks: the complete India guide
• Floating plants guide
• Duckweed guide
• Hornwort guide
• Fastest growing aquarium plants
• How to propagate aquarium plants
• How to plant aquarium plants

Planning a planted tank with water sprite for fry or shrimp? Message us on WhatsApp at +91 91523 30102 and we will help.