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Jelly like substance

The surface of my wildlife pond is covered in an orangey/green jelly like substance.  It is covering a fair amount of the whole surface area.  I was going to skim it all off but thought I'd better seek advice first.  Plants underneath the surface don't seem hindered by it.  What is it and what causes it?  It is extremely heavy and when I took out a net full to leave by the pond for critters to get out, it just flopped right back in!  There has been no chemicals added, filled only with rain water.  I am off on holiday for a month next week so if it needs doing, I'd like to get it done before hand.  Thank you all in advice.  My pond is now coming into it's 3rd year.  


  • SkandiSkandi Posts: 1,717
    Looks like old hatched frogs spawn to me, especially the top picture, bottom right and top left
  • Pete.8Pete.8 Posts: 10,933
    I had a couple of patches of similar looking stuff in my pond.
    I suspect it's various forms of algae.
    I just carefully lifted it out with my fingers, or use a net as it breaks-up easily and leave it by the pond for a day.
    I think it's just everything balancing out at the beginning of the season.

    Billericay - Essex

    Knowledge is knowing that a tomato is a fruit.
    Wisdom is not putting it in a fruit salad.
  • my small pond is full of green algae and a brown jelly like substance, it is in the sun. 
  • I keep taking it out with a net but it never decreases, any suggestions to what it is?
  • Pete.8Pete.8 Posts: 10,933
    edited May 2022
    It's algae and other similar simple plants.
    If you have some good oxygenating plants in your pond they will soon outgrow and outcompete the algae so the algae will diminish to the point where you'll hardly notice it.
    I've been scooping out similar from my pond for a few weeks now and then and the water is clearing nicely.
    Pond snails will eat the algae on the sides of the pond.
    If your pond is new, then it will take a couple of years to settle and balance.

    PS - I use Blagdon Barley Straw Bugs and Blagdon Sludge Buster in my little pond which I'm sure helps too

    Billericay - Essex

    Knowledge is knowing that a tomato is a fruit.
    Wisdom is not putting it in a fruit salad.
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