Type of stone

Discussion in 'Water Features' started by Niagara Falls, Feb 10, 2010.

  1. Niagara Falls

    Niagara Falls LawnSite Member
    Posts: 149

    I was surfing some of the threads here and someone was saying that definately do not use lime stone for a waterfall. I can't locate the post again, but what is wrong with it and what should I use.
    I presently have about 10 tons of limestone.
     
  2. tadpole

    tadpole LawnSite Bronze Member
    Posts: 1,216

    Limestone will raise the pH of the pond water. A high pH can cause problems for fish and is unsuitable for most aquatic plants.
     
  3. Niagara Falls

    Niagara Falls LawnSite Member
    Posts: 149

    Raise the ph to what? Is there not some way to neutralize this?
     
  4. tadpole

    tadpole LawnSite Bronze Member
    Posts: 1,216

    Limestone is exactly what the name implies. Lime Stone. Lime is a Base and is extremely alkaline. Most tap water is fairly close to neutral pH (7.0). How high will the pH be elevated? No way to really determine an exact measurement. 8.5 or higher is not improbable. Yes, it can be neutralized through the use of an acidic compound. The rub comes from the fact that because the limestone will be constantly leaching, an acid neutralizing agent must be constantly added also. This would entail considerable time and expense. Just use ANY other rock and eliminate the hassle.
     

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