Signs That Aquatic Weeds Are Becoming a Problem

Aquatic weeds are a natural part of lakes, ponds, and rivers — but left unchecked, they can quickly take over. What starts as a few floating patches can soon impact water quality, wildlife, and even safety.

Here are the key signs that aquatic weeds are becoming more than just a nuisance.

1. Dense Surface Growth

One of the first warning signs is thick mats of vegetation covering the water’s surface. Common culprits include duckweed and blanketweed. If more than 25% of the surface is covered, it's time to act. These weeds block sunlight, reduce oxygen levels, and choke out other aquatic life.

2. Reduced Water Flow

If you notice sluggish movement in what used to be free-flowing water, excessive weed growth could be the cause. Submerged plants like curled pondweed can create natural dams, disrupting flow in streams, drains, or channels.

3. Unpleasant Smells or Murky Water

Decomposing weeds and algae can release foul odours and make water cloudy or greenish. This is often a sign of low oxygen levels and too much organic material — a perfect breeding ground for further weed and algae growth.

4. Struggling Wildlife

If you're seeing fewer fish, frogs, or birds, aquatic weeds may be crowding out their habitat. Thick growth reduces oxygen levels and makes it harder for wildlife to feed, move, or breed.

5. Limited Access or Safety Hazards

Overgrowth can make it difficult to access the water for fishing, boating, or maintenance. In some cases, dense weed beds can trap debris or even pose risks for people or animals entering the water.

Don’t Wait Until It’s Out of Control

Once aquatic weeds take hold, they can spread rapidly — especially during warmer months when growth accelerates. Left unmanaged, the problem can become more costly and harder to control. The good news? Mechanical weed removal is an eco-friendly and highly effective solution. It allows for targeted clearing without the use of chemicals, helping to restore natural balance while protecting aquatic life.

At The Aqua Contractor, we specialise in keeping waterbodies healthy using sustainable, mechanical methods. Whether you're managing a private pond, an estate lake, or a public waterway, our experienced team can assess the problem and recommend the best course of action.

Contact us today to arrange a no-obligation site visit and get expert advice tailored to your water.