BlagdonGreen Away Pond Water Treatment, Clears Green Water and Suspended Algae Particles, Natural, Plant Friendly, Safe for Fish, 250 ml, Treats 5,000 Litres of Water,package may vary

Easy to apply using the integrated measure this cleared my small pond water within 24 hrs. From green mucky water to crystal clear! Fantastic result using this and will definitely use again when needed.

That my pond was like pea soup after a hot April/May is an understatement, I couldn't see an inch into the pond and wasn't even sure the fish had survived the winter.....my Blagdon 6 in 1 pump wasn't up to the job, partly because the UV bulb had failed, as did the new replacement bulb, so I bought a second 6 in 1 pump, put some Barley straw in and still no effect even though I was cleaning the pumps weekly.... time to try Greenaway.Pros - Almost immediately it turned some of the algae brown, within 4 hours I could see a couple of inches into the pond and spotted a couple of fish.....24 hours later and I could see at least 4 inches into my pond and some of the underwater bridges I had with plants on, the fish are so much happier and darting all over the place even though the clarity isn't brilliant yet, at least I know they are alive!Cons - I used the water from my water butts in a watering can with a rose on to spread the product all over my pond, from the pictures you will see that it has turned the powder coating on my ironwork pond covers reddish/brown, I also have some red spots where it has come into contact with the slabs on the edging, if I need to use it again I will be careful how I put it in the pond.I am cleaning both pumps out once a day until the water clears as even in 24 hours the amount of green sludge in the pumps is horrendous.I am confident that with patience this is going to work, I'm not going to rush giving it a second dose as already my fish are much happier, more active and at least I can see them..... I will update in a week or so.....

We have used this product before, but purchased from a garden centre.I have always found treatment of green water a dark art! what seems to work one year or with one type of green water doesn't the next time! However, whenever we have experieinced problems with the treatment we have always discovered that the problem we faced was not what we thought it was. In this product's case, we know that our pond will be subjected to at least 5 hours of direct sunlight through the months of May through to the end of September and we nearly always experience an algal bloom of some type or other and this seems to sort it out.Best applied first thing in the morning (ph is often lower then) and if you want the maximum benefit test the ph of the water first as this product is most effective between a ph of 6.5 to 8.5. Mix the required amount into a watering can and sprinkle it over the surface of the water you want to treat. It should clear the water in a single treatment, however, a further treatment may be required. You should expect an increase of sludge from the dead algae which might require a filter and pump clean in heavily "infected" ponds and I always use Blagdon sludge buster after applying this product to break down the dead algae to prevent that being a problem.Better used as soon as a bloom starts to form, or as we do around once a month from the end of May.

Dud not work as well as I expected. Still need to clean filter and pump weekly.

works very well

Unfortunately I used this product with enouth for four treatments for my pond size at 1500l it did not touch the green water and it's got greener. But I've found products are affected by location and pond, I'm in London and this one is not good for my pond.

Used this in a new wildlife pond. It appeared fast acting but rather than the gunge sinking to the bottom of the pond it settled on the rocks/ crevices etc . A gentle spray around the sides helped to shift it but still found it a bit messy.

Cleared the water to crystal clear