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Thread: Need help on rocks: is this Limestone or Sandstone?

  1. #1
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    Need help on rocks: is this Limestone or Sandstone?

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    Hi bros, anyone can help me see if the rocks I purchased are limestone or sandstones?

    Thank you!

    Sent from my SM-N950F using Tapatalk

  2. #2
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    Re: Need help on rocks: is this Limestone or Sandstone?

    why dont you take it out and add some drops of vinegar (or better yet, use a stronger acid like HCl if you have one) on it. If i fizzle. Then it is limstone. If it dont fizzle, then it will be safe for aquarium use.

  3. #3
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    Re: Need help on rocks: is this Limestone or Sandstone?

    Quote Originally Posted by ljohn78 View Post
    why dont you take it out and add some drops of vinegar (or better yet, use a stronger acid like HCl if you have one) on it. If i fizzle. Then it is limstone. If it dont fizzle, then it will be safe for aquarium use.
    Thanks John, I was actually trying to use limestone to increase my pH. I will try your methods to test my rocks.

    Sent from my SM-N950F using Tapatalk

  4. #4
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    Re: Need help on rocks: is this Limestone or Sandstone?

    Quote Originally Posted by Iceball View Post
    Thanks John, I was actually trying to use limestone to increase my pH. I will try your methods to test my rocks.

    Sent from my SM-N950F using Tapatalk
    You can just as well use boiled egg shell. Smah it and throw it into your tank filter or back of your tank.

    Sent from my SM-G955F using Tapatalk

  5. #5
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    Re: Need help on rocks: is this Limestone or Sandstone?

    Quote Originally Posted by ljohn78 View Post
    You can just as well use boiled egg shell. Smah it and throw it into your tank filter or back of your tank.

    Sent from my SM-G955F using Tapatalk
    Thank you for your pointers. Will give it a try!

    Sent from my SM-N950F using Tapatalk

  6. #6
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    Re: Need help on rocks: is this Limestone or Sandstone?

    Thank you for your pointers. Will give it a try!

    Sent from my SM-N950F using Tapatalk

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