Articles & Case Studies


Posted: Thursday 12th August 2010

As a UNESCO world heritage site, the Portuguese city of Porto is fast becoming a holiday destination of choice for British holidaymakers wanting to escape over the summer to an altogether different environment.

However, those holidaymakers with garden ponds will be alarmed, but not surprised to see that their pond’s worst nightmare - algae is also spending time in sunnier climes.

Algae thrive in Porto because of the wet, mild winters and long hours of sunshine during the summer dry season.

As one of Porto’s premier family visitor attractions, the Santo Inacio Zoo is a popular day trip for many visiting the city and surrounding area. Visitors will no doubt have been wowed by the fantastic collection of animals on display, but also surprised at the presence of algae in the Zoo’s water features.

Roberto Guedes, director of Zoo Santo Inacio was not happy about the presence of the suffocating weed either, but he found the solution in an unlikely place hundreds of miles away in West Yorkshire. He said: “I found Dyofix through an internet search, and the effects have been remarkable. In the past we have tried to clear the lake manually, which has taken a lot of time and the algae has just come straight back.”

Dyofix Pond Blue is a blend of EU-approved food colours that works by subtly dyeing the surface of the water so that ultra-violet light, the life-source of deep-lying algae cannot penetrate the surface. The algae then shrinks, and the murky pea soup colour fades to leave clean, clear water.

Peter Watson, director of Town End PLC who produces Dyofix, was delighted to be able to help. He said: “We have customers from all over Europe from Finland, Spain, France and Germany to name a few, so the algae problem is one that is spreading. When Roberto got in touch I could see straight away what the problem was, and we got the dye sent out the following day.

“Exporting is a growth area of our business, and the internet is a big part of that, it puts us in contact with businessmen like Roberto who can benefit from our products, who would otherwise not have heard of Dyofix.”

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