Also leave all filters on and clean them out every 2-4 days to get all the dead blanket weed out if the treatment does not work do a big water change and add Pink crystals from Ochard Fisheries www.orchardfisheries.co.uk/treatments/blanket-weed-control/anti-blanket-weed i use this in my 22,000 liter pond :)
I can spot 3-4 KOI the ones that are Koi have Barbles by the mouths :)
Also leave all filters on and clean them out every 2-4 days to get all the dead blanket weed out if the treatment does not work do a big water change and add Pink crystals from Ochard Fisheries www.orchardfisheries.co.uk/treatments/blanket-weed-control/anti-blanket-weed i use this in my 22,000 liter pond :)