How Do I Get Rid Of Blanket Weed In My Pond?

Getting rid of Blanket Weed in your garden pond can feel like a never-ending battle. See our post on how to banish Blanket Weed and get crystal clear water again.

Blanket weed causes and treating phosphates

There are many Blanket Weed remedies but first, you need to understand the causes:

  1. Plants, plants and more plants!  Any and all pond plants will help absorb additional phosphates within the ponds water system.

  2. Phosphate sponges – these have a limited lifespan but will work overtime to help reduce all levels of phosphate within your water supply.

  3. Water changes – Possibly the cheapest method of removing phosphates. But be careful! Some local tap water supplies can themselves contain high levels, so be sure to test before using this as an option!

These are the main causes of exponential blanket weed growth.  Any steps taken to remove phosphates, or restrict them from your water system is always beneficial as whilst there is not a high-risk factor to fish, all forms of plant life will thrive so it is best to avoid letting too much getting to your pond.

Excess exposure to sunlight provides vital energy to all forms of algae to perform photosynthesis, which means that tackling blanket weed whilst the sun is shining is a never-ending project. It is vital to make sure that your pond has some shade or that you have plants such as lilies that cover some of the surface water. It is key to remember that when treating your pond in sunny weather with our blanket weed treatment, to double the dose to see a difference. Perhaps building partial decking cover?! 

Blanket Weed Treatments

The best method with all treatments is to remove as much as possible before adding anything to the water.  It’s a simple point of exposure.  If you treat a pond full of blanket weed with 500ml of treatment, then that is going to have a harder time battling if you were to treat a freshly pruned pond with the same amount making it a much more concentrated attack on the blanket weed itself.

Barley Straw is a cheap and sustainable alternative to most treatments without any worry of overdose.  It is generally advised that it is added to the pond system late February early March as it requires a germination period (4-6 weeks) within the water as the enzymes saturation the pond. 

Your other option, and by far the most effective in the long run, is chemical treatments.  But they offer a much more direct impact on the blanket weed without a need to wait around for gestation. Our very own Pond Rescue Blanket Weed treatment offers a fast-acting relief for blanket weed by using enzymes to tackle the problem face on without harming your fish.