Algae is caused by an imbalance of light, nutrients and CO2 - usually too much light for too long. Fix the balance, add a clean-up crew, and algae fades. Here's a practical plan, plus the products that help.
Cut the root cause first
- Reduce light to 6-7 hours on a timer, and lower the intensity if it's strong (see our lighting guide).
- Keep nutrients balanced - both excess and starvation feed algae (see fertiliser & algae).
- Do bigger, regular water changes and remove visible algae by hand as you go.
Products that help
- Sunken Garden Zero Algae - an algae-control solution for stubborn outbreaks.
- Liquid carbon - Seachem Excel or Sunken Garden CO2 Boost help plants outcompete algae and can spot-treat hair algae.
- Clean-up crew - Amano shrimp, nerite snails and otocinclus graze algae naturally.
Match the fix to the algae
Green water is usually too much light or nutrients; brown diatoms are common in new tanks and often fade on their own; hair and black-beard algae point to a light/CO2 imbalance and low flow. Steady, balanced conditions beat any quick fix - see consistent dosing.
Frequently asked questions
How do I reduce algae in my aquarium?
Cut light to 6-7 hours, balance nutrients, do regular water changes, add a clean-up crew, and use liquid carbon for hair algae.
What causes algae in a fish tank?
An imbalance of light, nutrients and CO2 - most often too much light for too long.
Does liquid carbon kill algae?
It helps plants outcompete algae and can spot-treat hair and black-beard algae; follow label doses.
What eats algae in an aquarium?
Amano shrimp, nerite snails, otocinclus and some plecos graze algae.
Why do I get brown algae in a new tank?
Diatoms are common while a tank matures and usually fade on their own within a few weeks.
Should I stop fertilizing to fight algae?
No - starving plants makes algae worse. Balance light and dose steadily instead.
Beat algae with the right tools from Fish Bazaar - Sunken Garden Zero Algae and liquid carbon, delivered across India.
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