On 2013-05-21 14:08:38 +0100, Wendy Tinley said:

On 13/05/2013 16:00, Sacha wrote:

On 2013-05-13 13:47:16 +0100, Wendy Tinley said:

On 10/05/2013 18:47, Sacha wrote:

It was mentioned on Twitter, possibly by someone who uses the dye for a
reflective pool. Can you tell us if any of the products have an effect
on duckweed? Quite apart from that particular pest, people here often
post about cloudiness or weed in their ponds.

Hi Sacha,

I've forwarded the discussion to one of the directors, Peter Watson.
He's not replied so he could be on holiday. He's a really approachable
man and will give info about the product.

My interest is that I'm a supplier to their company, not that I work
for them.

Best regards

Thanks, Wendy. If it has an effect on the dreaded duckweed, we'll
certainly be customers and I'm sure there would be a few others, too!

Hi Sacha,

Received a reply to day from Peter Watson. In answer to your query
about duckweed; Peter wrote:

--------------------
'Duckweed winters at the bottom of ponds and only grows when enough
sunlight is available for photosynthesis to occur. Using DyoFix from
early springtime will prevent a lot of light reaching the wintering
weeds and may prevent growth.'

'As duckweed is a free floating weed, once it has reached the surface
DyoFix cannot prevent growth. The only remedy is manual removal once it
has floated to the top.'
-------------------------

There is a letter from a customer on their website that mentions
duckweed. (http://www.dyofix.co.uk/pond-blue-news.html)
snip of helpful post!

Thanks so much Wendy. That really is of interest and great help. I
love the posh blue-rinse Lab!
--

Sacha
www.hillhousenursery.com
South Devon
www.helpforheroes.org.uk

On Tue, 21 May 2013 16:36:22 +0100, "Bob Hobden"
wrote:


'As duckweed is a free floating weed, once it has reached the surface
DyoFix cannot prevent growth. The only remedy is manual removal once it has
floated to the top.'
-------------------------

There is a letter from a customer on their website that mentions duckweed.
(http://www.dyofix.co.uk/pond-blue-news.html)


The only way to eradicate Duckweed is with one of these products that skim
off any floating debris.
Even so it will take some time to complete the job as the duckweed gets
caught in other plants but you would notice a difference within a very short
period. You would also have to clear out the captured duckweed quite often.
especially at first, after that once a day is OK.
Clearing the surface of the pond of all floating debris makes a huge
difference to the look of a pond.

http://www.pondpumpsdirect.com/Oase-...s/c-1-324-330/

Funny enough I have just come in from emptying the basket of our
swimskin 25 as featured on that page. On it's 5th season now and
despite being abused by being left out in winter the motor still runs
fine. We have a wildlife pond so no fish to worry about but do like to
the keep duckweed under control. Doubt if I will ever eliminate it
completely due to the other plants trapping it but the majority of the
pond is kept reasonably clear. A weekly session with a tea strainer on
a long bamboo cane digging amongst the margins and plants then tipping
in front of the skimmer is quite therapeutic. Some around the margins
is appreciated by the resident frogs judging by the number of heads
peering at me when I am by the pond,at the moment the tadpoles have
reached the stage of feeding on it and I have found young newts
sheltering under it so it's not all bad. The pond is not in ideal
location and suffers from the fallout of some sycamores and some
exotic bush that is chucking in petals by the dozen at the moment.
The skimmer removes a lot of that debris and despite the odds against
it the pond remains clear without any additions.

G.Harman