Controlling Blanket Weed with Ultrasound

Pool with blanket weed problem prior to treatment with a PondTec ultrasonic unt

The presence of blanket weed in a pond or lake is unsightly, a hazard to fish and difficult to get rid of. To remove physically takes time and effort and the weed will regrow almost as fast as it is removed.

Garden pool with a blanket weed problem prior to the installation of a Pond Tec ultrasonic algae control device

The Smart Sonic ultrasound units are very efficient at killing blanket weed and if installed early in the year, before the weed has started to grow, then any growth is halted before it has a chance to become established. If a Smart Sonic ultrasound unit is installed once the blanket weed has become well established, the ultrasound will kill the blanket weed,turning it brown. However, the dead weed will still have to be physically removed from the water and disposed of well away from the pool. Leaving dead weed on the edge of the pool means that as it rots, nutrient will return to the water, feeding further growth.

Blanket weed free pool with a PondTec ultrasound unit installed.

In the above photograph, taken a few weeks after a PondTec ultrasound unit was installed (foreground), the blanket weed has almost all been eliminated, what little remained can be seen on the jetty on the right of the picture.

Amport Trout Fishery, Nr Andover, Hampshire

We were contacted  by Will, the owner of this chalk stream fed trout fishery, because he continually suffered from blanket weed during the summer. Not only did it make the fishery look unattractive, but also made fly fishing almost impossible at times.

Blanket weed growth at Amport trout fishery

Amport Fishery early in the year, showing the blanket weed growth.

A Smart Sonic 50, with two transducers was installed at the fishery on May 5th, 2015.  We contacted Will to find out how things were, his reply was:
“Lake looks fab thanks, no blanket weed, happy fishermen and low maintenance for me. When I add up the time I would have had to spend raking out the algae, along with the increased number of fishermen coming to fish due to the clear pond, the unit must have paid for itself within 6 months! Don’t why I didn’t install one ages ago! Thanks, Will


Amport fishery after 9 weeks treatment with a Smart Sonic ultrasound unit

Amport fishery after 9 weeks treatment with Smart Sonic ultrasound, no blanket weed.

Other customer’s comments:

New 2000 sq.m lake. First year clear. Second year massive blanket weed. Called Simon who installed a two transponder ultrasonic system.
Effect? Third year a gin- clear lake . Happiness abounds. This system really works.
Prof. D Norburn. Surrey. August 2016

The ultrasonic units are working a treat we have not he one single algae bloom this year which has probably saved me 8 hrs in every week so your system is worth every penny.
Keith Attfield
Caretaker, Encombe House. Dorset. 2017

Dear Simon.
I know that I am not supposed to be astonished but the pond is usually covered in blanket weed by now but the only bit is in the little inlet to the side where the ultrasound can’t reach and I’m not bothered about that, the whole pond is otherwise clear. So absolutely terrific; I am thrilled as are the 8 swans that have adopted us!
I am now going to order the trout, something that I never thought that I would be doing.

J Harrison. York. May 2018

Dear Simon,
Firstly, just to state that your equipment has been a great success this year, we could not have been happier. The hours of work it has saved us……. I am just sorry that we do not have any ‘truthful’ pictures to support our statements.
Dudley. Chairman, Chichester Canal Trust. September 2018

N. B. If a pond or lake has a heavy growth of submerged vegetation, then ultrasound is not an option, as the vegetation will disrupt the ultrasound signal, making in ineffective.