Emerging from the verdant depths of your sublime aquatic landscape, a silent, unrelenting tide of green engulfs your immaculate aquarium's bountiful gardens, clouding the clear waters with its suffocating grip. Algae, the ever-lurking adversary of the passionate aquarist, threatens to unravel the beautiful harmony that underpins your carefully crafted underwater ecosystem. Unyielding and omnipresent, algae seem to defy the ingenuity and determination of even the most adept fishkeeper. Perfect Aquatics, one of the UK's largest aquatics specialists, champions the vigilant pursuit of algae control, arming enthusiasts with a web of expert guidance and resources designed to identify, understand, and combat this pervasive nuisance.

Algae Identification: Recognising Common Types in Aquariums

To effectively counteract algae growth, it is essential to familiarise oneself with the predominant algae varieties that afflict aquariums:

  1. Green Water (Algal Bloom): Appearing as a sudden, pervasive green haze throughout the water column, this free-floating algae often results from excessive light exposure or increased nutrient levels.
  1. Brown Algae (Diatoms): A common nuisance in new aquariums, brown algae or diatoms manifest as a film of brown particles on surfaces, rapidly colonising all available space within the aquarium.
  1. Green Hair Algae (String Algae): Resembling long strands of hair, green hair algae cling to plants, substrate, and decorations, growing in length and forming tangled masses that harm the plant and fish life.
  1. Black Beard/Brush Algae (BBA): An aggressive and resilient algae type, BBA forms tough, blackish-green tufts that adhere to plant leaves, equipment, and tank decorations, often proving challenging to eradicate.

Common Causes and Triggers of Algae Growth

Successful algae control depends on understanding the root causes and factors that promote and sustain growth:

  1. Excessive Light Exposure: Algae thrive in conditions with abundant light exposure, and leaving aquarium lights on for extended periods or placing the tank near windows can lead to algae growth.
  1. Nutrient Imbalance/Overfeeding: Excess nutrients, from both overfeeding and decaying plant matter, create a fertile environment for algae proliferation. Nutrients such as phosphates and nitrates act as fertilisers, fueling rapid algae development.
  1. Poor Water Quality and Maintenance: Accumulated waste and infrequent water changes contribute to poor water quality, creating an environment conducive to algae growth and inhibiting the healthy bacteria vital for maintaining a balanced ecosystem.

Preventative Measures: The Key to Staying Algae-Free

In the battle against unwelcome algae, a proactive, preventive approach delivers the strongest defence:

  1. Regulating Light Exposure: To minimise algae growth, limit aquarium lighting to around 8-10 hours per day and install a timer for precise control. Additionally, avoid placing aquariums in direct sunlight, as this can exacerbate algae issues.
  1. Maintaining Proper Water Quality: Regular partial water changes (around 20-30% weekly) are vital to maintaining a healthy aquarium. Routine water testing, combined with regular maintenance of the tank's mechanical, chemical, and biological filtration, will help to keep water parameters stable and minimise algae growth.
  1. Controlling Nutrient Levels: Feed fish a measured, balanced diet to avoid overfeeding, and promptly remove any uneaten food. Invest in efficient filtration to help control the accumulation of algae-fuelling nutrients, and consider incorporating fast-growing plants or an algae scrubber to help absorb and utilise excess nutrients before algae can grow.
  1. Careful Plant Selection and Maintenance: In addition to using fast-growing plants that compete with algae for nutrients, regularly trim and remove decaying leaves to reduce available nourishment for algae growth. Be thoughtful of your plant selection and ensure that the species chosen are compatible and well-suited to your aquarium's conditions.

Additional Algae Control Solutions

Should preventative strategies prove insufficient, consider these additional algae control solutions:

  1. Algae-Eating Species: Adding algae-eating fish or invertebrates, such as otocinclus catfish, amano shrimp, or nerite snails, can help control certain types of algae in your aquarium. However, ensure compatibility with the existing fish and plants before introducing these species.
  1. Natural Algae Removal Techniques: Manual removal, for example, using a magnetic algae scraper, can be a useful method to eliminate excess algae growth. Additionally, introducing natural supplement products designed to reduce algae can aid in controlling persistent issues.


Embraced within the quiet tranquillity of pristine waters, the radiant dance of aquatic life flourishes under the watchful eye of the keen aquarist. Yet, every effervescent ripple is etched with the lingering spectre of algae, ever-prepared to reclaim its domain within the heart of the underwater realm. Bolstered by the unwavering dedication of Perfect Aquatics, seize the reins of this eternal struggle, champion your aquatic sanctuary, and banish the malevolent tide of algae from your haven of grace and beauty.

Lean upon the expert insight, open hearts, and steadfast commitment of Perfect Aquatics, as you forge an impenetrable fortress against the encroaching forces of algae. Reclaim the radiant serenity of your aquarium, and proudly declare your victory in the endless battle for clarity, purity, and balance. Visit our aquatics store in the UK now!