Hi grotbag
For quick growing ,oxygenating weed that doesn't need planting,you cannot beat Hornwort.It regenerates each year too.It would also be a good idea to get some duckweed which will shade the surface and help prevent the blanketweed coming back.
Why do places of work start off with a nice pond,put fish in it then neglect it?Good on your other half,i say.But in the long term i am afraid it will need more than just fresh weed.If it hasn't got a pump and filter and the fish need to be fed it will get bad again.Can anyone be persuaded to get it sorted out properly?
I had this situation years ago at a locaL hospital where i went to work.It was dreadfully neglected and i made a big fuss.Another pond had been built and was not being used so i asked around till i got permission to move them.A chap who was the groundsman helped me and i begged and borrowed from my local aquatic centre,all the equipment needed to set it up with a pump and filter.I was angry that the fish had been so neglected,and was glad when they were put into the new pond.For 3 years i looked after the pond even after i left the job,and eventually i enlisted the help of others to make sure it was attended to.
