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Horticultural grit

Hey just wanted to ask if its okay to use this to cover my pond plants in my fish pond and wildlife pond? I'm sure I read Horticultural grit it poison to fish, but not sure to wildlife?

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  • ZenjeffZenjeff Newcastle Upon Tyne Posts: 571

    Hi

    I use RHS horticultural grit for my pond baskets states Lime free washed granite angular grit.
    Ideal Uses: Adding to composts, Ponds & aquatic planting, Alpines & rock gardens, Improves drainage & aeration to help roots grow deeper and produce stronger plants., never had any problems

  • nutcutletnutcutlet PeterboroughPosts: 26,160

    Can't see how grit could be poisonous

  • WaysideWayside Posts: 800

    Not sure the definition of grit, but if the small stones are dis-solvable  - like chalk - then I guess you could have a problem.

  • WaysideWayside Posts: 800

    Mind you I just read this: http://www.framlinghamfisheries.co.uk/chalk.html which implies chalk can be good for fisheries.

  • DovefromaboveDovefromabove Central Norfolk UKPosts: 64,446

    Chalk streams are hugely important wildlife habitats ... can't see how chalk can be a problem. 

    http://www.wildlifetrusts.org/wildlife/habitats/chalk-streams 

    “I am not lost, for I know where I am. But however, where I am may be lost.” Winnie the Pooh







  • Pete.8Pete.8 Billericay, EssexPosts: 6,104
    Wayside says:

    Mind you I just read this: http://www.framlinghamfisheries.co.uk/chalk.html which implies chalk can be good for fisheries.

    See original post

     Forgive the pun, but I think that article refers to a whole different kettle of fish :)

    H/grit is usually granite chippings but I got some recently which is more gravel-like and def. not granite.
    An easy way to check if there is something in there you don't want in your pond - take a small sample (very small handful) of the grit, put it in a saucer and pour on some vinegar, if you see a stream of little bubbles rising to the surface for a while, then it may not be suitable. But being realistic, you're not going to adding huge amounts anyway, so it's unlikely to have any effect whatsoever.

    Knowledge is knowing that a tomato is a fruit.
    Wisdom is not putting it in a fruit salad.
  • Pete.8Pete.8 Billericay, EssexPosts: 6,104

    Chalk in moving water like streams is fine of course, the problem with a contained body of water like a pond is that rainwater is slightly acidic and little by little it will dissolve the (alkaline) chalk and raise the pH of the water possibly to a dangerous level

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