will growing watercress in my pond stop or cure blanket weed growing?

Answer 1

Using watercress in a bio-filter works very well in controlling blanket weed in ponds. This is one of many testimonials on the following web site.
The real star has definitely been watercress. It took a while to get going and I did have a bit of blanket weed at the start of the year but as soon as the cress was growing strongly it disappeared. www.uk.gardenweb.com/forums/load/ukponds/msg071111049161.html?9 - 50k