Dear David
I would like to say how pleased we are with the Ultrasonic 20 that we fitted to our 50' motor cruiser. It has been installed for over a year and, although we have not lifted the boat since, appears to be fulfilling its promise of keeping the hull clear of weed, worm & general fouling. Due to ill health the boat has not left her mooring in the marina in this time,but we are hoping to start cruising again in the next month.There is a very small film of "slime" that can be felt on the hull under the water, but we are confident that this will be washed off once we start using her again.
We were slightly dubious about the claimed effectiveness - it certainly sounded too good to be true, but our experience to date has proved that IT REALLY WORKS!!!! ( Much to our delight & relief)
Thank you for your help & advice - we are more than happy to endorse your excellent product.
When we lift her again next year we will send you more photos to show the condition of the hull.
Best wishes
James & Carole Dean | 
