How to Prevent Algae Growth in a Planted Tank

Blessings Aquarium
Jul 3
3 min read

Algae growth is a common issue for planted aquarium owners, especially those aiming for a lush, healthy aquascape. If you're wondering how to prevent algae growth in a planted tank, you're not alone. Algae not only ruin the aesthetics of your tank but also compete with aquatic plants for nutrients and light.

In this blog by Blessings Aquarium, Pune's most trusted aquarium experts, we’ll explore practical, proven ways to prevent algae in planted tanks — without harming your fish or plants.

Why Does Algae Grow in a Planted Tank?

Algae thrive when there's an imbalance of light, nutrients, and CO₂. Here are the main triggers:

Too much or prolonged lighting
Excess nutrients, especially nitrates and phosphates
Lack of CO₂ or poor water circulation
Infrequent maintenance
Overfeeding fish

Understanding these causes is the first step toward controlling algae in your tank.

How Much Light Should a Planted Tank Get?

Lighting is essential for plant growth, but excessive light encourages algae. Here’s what to do:

Use a timer to provide 6–8 hours of light daily.
Avoid placing the tank near direct sunlight.
Choose full-spectrum aquarium LED lights suited for planted aquariums.

At Blessings Aquarium Pune, we offer lighting solutions tailored for your specific tank size and plant types.

What Role Does CO₂ Play in Algae Prevention?

CO₂ supports plant growth, allowing them to outcompete algae for nutrients. Low CO₂ levels often lead to algae problems like hair algae or black beard algae. To fix this:

Use a CO₂ injection system in high-tech tanks.
In low-tech setups, consider liquid carbon supplements.
Ensure proper water circulation so CO₂ reaches all areas of the tank.

How Do I Balance Nutrients Without Feeding Algae?

Algae love excess nitrates and phosphates. Here's how to strike the right balance:

Test water regularly using aquarium test kits.
Use quality fertilizers like macro and micro nutrients in proper doses.
Perform weekly water changes of 25–30% to remove built-up waste.

We recommend aquarium-grade plant fertilizers, available at our store and online at www.blessingsaquarium.com.

Are Algae-Eating Fish or Shrimps Helpful?

Yes! Certain species naturally control algae by grazing on it. Great additions include:

Amano shrimp
Otocinclus catfish
Siamese algae eaters
Nerite snails

Remember, these helpers complement your algae prevention strategy, but don’t replace proper tank maintenance.

How Often Should I Clean My Planted Tank?

Consistent tank maintenance is crucial in preventing algae:

Clean the glass every week using an algae scraper.
Vacuum substrate gently to remove uneaten food.
Rinse filter media in tank water monthly.
Trim dead leaves from plants regularly.

Want help with this? Explore our monthly aquarium cleaning service in Pune!

Can I Use Algae Control Products?

Yes, but with caution. Use aquarium-safe algae control solutions only when natural methods fail. Always follow the dosage instructions and monitor plant and fish reactions.

At Blessings Aquarium, we guide you on safe product use to avoid harming your ecosystem.

Final Tips to Keep Algae Away

✅ Don’t overfeed your fish

✅ Avoid sudden changes in lighting or nutrient dosing

✅ Quarantine new plants to prevent introducing algae spores

✅ Maintain consistent CO₂, light, and fertilization schedules

Visit Blessings Aquarium Pune for Expert Planted Tank Solutions

Whether you're a beginner or a seasoned aquascaper, Blessings Aquarium offers custom-planted tanks, fertilizers, CO₂ kits, and professional advice to help you keep your aquarium algae-free.