Blagdon Clear Pond Water Treatment, 1 Litre, Clears Dirty Green or Brown Cloudy Water Quickly, Natural, Wildlife Safe, Harmless to Fish and Filter Bacteria, 1L, Treats 20,000 Litres of Water

Great product, used it before and had no issues There are a few negative reviews on here stating it doesn't work or takes too long to clear so Ill try to expand on when it won't work and what it does The chemicals within this (mainly formaldehyde) bind together the very fine particles of detritus into larger clumps so your filter can catch them where previously they would pass straight through Will it remove muddy water? Chances are no, only a deep clean with a vac and large water changes will clear this, in fact cotton wool will do a better job in this case What is it is best at removing? Suspended algae and detritus floating in the water column. Do I need a pond filter? Yes, this chemical only binds the finer particles together in larger clumps, you still need a filter (50 microns or less) to catch the newly formed clumps Adding pre-rinsed cotton wool to the filter will also do this micron job How do I add it to the pond? I would suggest adding only the correct dosage as stated to the pond once a week, remember it's still formaldehyde, that's the chemical they use to preserve dead bodies Very very slowly add it to a moving water flow, preferably the point furthest from your filter The water will go a slightly cloudy white look, this is due to the chemical instantly binding the larger particles of muck which is why you can now see them How long will it remain in the water? Depending on your filter/pump flow rate I would expect 10x the volume of the pond / pump speed Eg. if a pond is 10,000 liters in size, multiply this by 10 = 100,000 and your pump is running at 20,000 liters per hour 100,000 ÷ 20,000 lph = 5 hours to clear Note* during the dosing cycle, ensure you keep checking the filter, if it is a 50 micron or finer, it will block quite quickly requiring regular cleaning of the filter, this is a must during the dosing cycle (A Micron is a millionth of a meter, So a 1,000 micron filer will have 1mm holes in it, 50 micron filter is, you guessed it, 0.05mm holes, the smaller the number the smaller the holes) I did shop around and even found it to be cheaper from Amazon than any local supplier which surprised me.

Use this most of the time along with barley straw in my pound works well. I also use in my aquarium but have to get the right dosage exactly or will kill fish, find its much better to use than most of the proper aquarium cleaners which are no good and way over priced will cloud up but that shows it's working within 24hrs water is really really clean when you empty filters use will see results for yourself but as said Got to get dosage right, I have a 200lt best if you know your literage in tank then you get the dosage right, if not have to do by size and that is harder to work out i did get it wrong at first now I don't and a bottle last a long time than others.

I only have a small nature pond which looked dirty and pea soup green. I bought this product to hopefully try and clear it. It only holds 110 litres so I measured the correct amount, 5ml, mixed it with water and poured it in. Nothing happened for about a week then slowly it started to clear and by the end of the second week it is crystal clear. The bottle is 250 ml which is obviously enough to treat it 50 times ( should it need it). So, a great product at a good price.

Made no difference to the colour of my pond water. Gave 3 doses over 6 days, no change.

I have a new wildlife pond that does not have any kind of pump or filter. After a few weeks the water was very murky brown and I couldn't really see the bottom. I found the product easy to use. I followed carefully the clear instructions for calculating the volume of water in the pond and therefore how much of the product I needed to apply. The water volume calculation could only be an estimate during to the irregular shape and depth of the pond, so if anything I decided to slightly underestimate the amount of product to apply. I mixed it with warm water in a bucket and decanted the mixture into a watering can fitted with a rose, then poured the mixture evenly over the pond surface. The water cleared gradually day by day until after a week it was as clear as could be expected. Now I can see everything at the bottom of the pond, so the product has been very effective, even during extremely hot weather. There is plenty left for any further dosage so I think it's good value for money .

Please please don't buy this if you have pond fish! We used this in our pond having had the same very happy pond fish for a long time. The next day it appeared to us that all the fish had been eaten by a bird or cat (having never had this issue before). We bought new pond fish who were initially absolutely fine, and when using this product again all three fish were dead later the same day. We can only assume the initial fish died as a result of this product and were found by a creature overnight. Absolutely horrifying. Please please please avoid!!!

Does what it says, very happy with this product.

Not suitable for requirements

No fue muy buena compra, no se si por no saber exactamente cuanta cantidad poner al estanke tengo o si tenia espectativas mayores que no cumplio, tuve que utilizar otro producto para conseguir algun resultado y ver el agua clara, seguramente agruparia las particulas y realizó su funcion, pero yo esperaba fuera otra su funció, fuera UTIL limpiando el alga,,,

Märkte ingen skillnad i dammen

The product itself is good! But I have ordered the Blagdon Green Away twice, and the seller has replaced my order with the Clear Pond, with no explanation. Guess I can't trust the seller! Beware.

Dieses Produkt hatte Null Wirkung ,das Wasser ist genau so trüb geblieben wie vorher.Außerdem wäre eine deutsche Gebrauchsanweisung,wie man bei anderen Artikeln kennt empfehlenswert.

2 traitements et aucune amélioration ! C'est agaçant toutes ces belles promesses n'ont tenu. Encore de l'argent jeté par les fenêtres.