Blanket weed has to be the biggest subject of discussion in the koi and water gardening industry.

Here are a few quotes from leading manufacturers of blanket weed and algae products

Evolution Aqua Stop Blanket Weed

Evolution Aqua Stop Blanket Weed gives Increased oxygen availability.
Evolution Aqua Stop Blanket Weed is Impossible to overdose.
Evolution Aqua Stop Blanket Weed is Safe for all pond inhabitants.
Evolution Aqua Stop Blanket Weed is Very effective. Dose only as needed.

FreeFlow

Freeflow Blanket Weed…Blanketweed is a major problem for Koi and pond keepers.
FreeFlow Blanket Weed…is concentrated barley straw extract and quite simply gets rid of the dreaded blanket weed.
Freeflow Blanket Weed…simply and effectively prevents new spores being released into your koi or watergarden pond.

Viresco

Viresco koi blanket weed…Removes nitrate.
Viresco koi blanketweed…Harmless to wildlife.
Viresco koi blanketweed…Reduces phosphate. 

SOME CUSTOMER COMMENTS

Cloverleaf Blanket Answer. I used this product April last year and still no blanket weed yet, its brill stuff

After 14 years of blanket weed problems I have found a cure!!!!!!!!!!
The product is called Blanket Answer and is sold by Cloverleaf

Cloverleaf Blanket Answer. I don't know anyone it has NOT worked for

If you have approx £15 to spend...get some Cloverleaf Blanket Answer. This stuff is magic and trust me...it clears the blanket weed.

Cloverleaf Blanket Answer

Cascade are committed to stocking only the best blanket weed products.

 Cascade has had excellent customer response to All the blanket weed products on this site.