It worked a treat.....this with new uv bulb i got crystal clear water!!....it has left a bit of a white residue ...but no biggie....great advice re this product...cheers buddy
depending on the size of the pond might be worth looking at hydra aqua who sell in much larger quantities and have a wider range have used both companies and now use hydra aqua
The most important thing is does this product prevents the blank weed from coming back? Pouring some diluted hydrogen peroxide into your pond also cause the blank weed to brown off but they'll come back in a couple of weeks.