I think the problem was arising from not using aquatic compost for all my plants - I just used normal compost! oops. So we bought some aquatic compost and I repotted everything over the weekend.

I looked in the pond this morning and it is crystal clear!

I guess that the balnket weed will come back as I don't think I cleared it all out, but I think I've got it under control. We looked in the garden center for some barley straw and could not believe that a tiny bundle was being sold for £4.99!!!! Outrageous!

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