Question 1

What is Spirulina Powder and why is it used in aquariums?

Accepted Answer

Spirulina is a blue-green microalgae (Arthrospira platensis) and one of the most nutrient-dense natural supplements available for fish. In aquariums, it is used as a food supplement to enhance fish colour naturally, boost immune health, support digestive function and improve breeding condition. It is widely used by hobbyists across India for goldfish, cichlids, guppies, discus and more.

Question 2

Which fish benefit most from spirulina powder?

Accepted Answer

Herbivorous and omnivorous fish show the most dramatic results — Goldfish, Koi, Cichlids, Discus, Plecos, Mollies, Guppies, Angelfish and Rainbowfish. These species naturally graze on algae in the wild. Carnivorous fish like Bettas can also benefit from small supplemental amounts for colour and immunity, but spirulina should not be their primary food.

Question 3

How do I feed spirulina powder to my fish?

Accepted Answer

There are three easy methods: (1) Dust method — sprinkle a small pinch directly over flakes or pellets before feeding. (2) Paste method — mix with a few drops of water to form a paste, apply to tank glass. (3) Water method — dissolve in a cup of tank water and pour slowly into the aquarium for fry and filter-feeding setups. Feed 2–3 times per week as a supplement.

Question 4

How much spirulina powder should I use per feeding?

Accepted Answer

Less is more with spirulina. For tanks up to 30L, use a small pinch (approx. 0.1g) per feeding. For 30–60L tanks, use 0.1–0.2g per feeding. For tanks above 60L, use 0.2–0.5g as needed. Feed 2–3 times per week, not every day, as part of a varied diet. Overfeeding can cloud water temporarily.

Question 5

How quickly will spirulina improve my fish colours?

Accepted Answer

Most hobbyists notice visible colour improvement within 2–4 weeks of consistent use (2–3 times per week). Species with red, orange, yellow or blue colouration respond fastest — goldfish, discus and guppies show particularly dramatic results. The improvement is gradual and natural, unlike synthetic colour enhancers.

Question 6

Can spirulina powder be fed to fish fry?

Accepted Answer

Yes, spirulina is excellent for fry. Dissolve a tiny pinch in tank water and add to fry tanks — fry consume it as micro-particles suspended in water. It significantly boosts early growth, strengthens immune response and improves survival rates in juvenile fish. Especially effective for Guppy, Molly and Livebearer fry alongside Microworms as first food.

Question 7

Can I use spirulina to feed my Daphnia or Moina culture?

Accepted Answer

Absolutely — this is one of the best uses of spirulina powder. Add a micro-pinch to your Daphnia, Moina or green-water culture as a feed booster. This dramatically improves culture density and the nutritional quality of the live food you feed to fish. This practice is called gut-loading — your fish receive maximum nutrition via the live feeds. Use sparingly as overfeeding can foul culture water.

Question 8

Is this spirulina food grade or aquarium grade?

Accepted Answer

Our spirulina is premium aquarium grade — pure, fine-milled Arthrospira platensis powder with no fillers, binders or artificial additives. It meets food-grade standards and is safe for use in aquariums, ponds and live culture setups. It is the same type of spirulina used in human health supplements, just offered at aquarium hobbyist quantities and pricing.

Question 9

How should I store spirulina powder to maximise shelf life?

Accepted Answer

Store in an airtight container in a cool, dry place away from direct sunlight and moisture. Heat and light degrade the nutritional content over time. For Indian climates, storing in a refrigerator (sealed) is recommended to extend freshness, especially during summer months. Properly stored, it remains effective for 24 months from manufacture.

Question 10

Will spirulina cloud my aquarium water?

Accepted Answer

A small amount used correctly will not cloud water noticeably. If you add too much at once, the water may turn slightly green temporarily but will clear within hours as fish consume it and filtration processes the excess. Start with a very small pinch and increase gradually. Green-tinted water from spirulina is harmless and actually beneficial for fry setups.

Question 11

Can spirulina replace my regular fish food?

Accepted Answer

No — spirulina is a supplement, not a complete diet. Use it as an addition to your regular flakes, pellets or live food routine. For herbivorous fish like goldfish and plecos, spirulina can make up 20–30% of the diet mixed with their staple food. For other fish, use 1–2 times per week alongside normal feeding for best results without digestive imbalance.

Question 12

Does spirulina help with fish breeding and conditioning?

Accepted Answer

Yes, significantly. Regular spirulina feeding improves breeding readiness in many species. The high protein, vitamins and antioxidants support reproductive health, improve egg quality and increase the vibrancy of male display colouration during courtship. Indian breeders report better spawning success with Guppies, Discus and Cichlids when spirulina is included in the conditioning diet alongside live foods like Microworms and Daphnia.

Nutrient	Value (dry weight)
Protein	60–70%
Carbohydrates	15–25%
Lipids	6–8%
Beta-Carotene	≈1700 mg/kg
Iron	≈580 mg/kg
Vitamin B12	≈200 µg/100g
Phycocyanin	12–20%

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