lime stone

Discussion in 'Water Features' started by just pondering, Apr 30, 2009.

  1. just pondering

    just pondering LawnSite Member
    Messages: 51

    Ok I've been installing ponds for over 10 years and i have a customer that likes the look of flat outcropping lime stone but i've heard that using lime stone in a pond will spike up the ph so high that you have a hard time lowering it, i know koi like a little bit of ph but also heard it causes large algae blooms I'm no chemist can anybody shine some light on this subject?

    Pondering Waters, MI
  2. benjammin

    benjammin LawnSite Senior Member
    Messages: 251

    Limestone will give you hard water so I would think you could just add a water softner, just like on my well at home that is pulling water from a limestone aquifer (Castle Hayne). I was going to try to explain the difference between hard water and pH but found a better answer via google and an aquarium message board:
    While water hardness and pH do not necessarily go hand-in-hand they often follow a trend in that hard water usually has a high pH while soft water has a low pH. This is the result of the fact that many dissolved minerals will inhibit the presence of free hydrogen ions one way or another. However, this is only a generality. In truth, you can have extremely hard water that is equally extremely acidic or vice versa.

    Also, soft water tends to have a more dynamic pH than hard water. In other words, since soft water doesn't contain many dissolved minerals, its pH changes more easily than the pH of hard water. (Again, generality)

    Hope that helps.
  3. tadpole

    tadpole LawnSite Bronze Member
    Messages: 1,221

    Based on your post, I am assuming that the limestone will only be used for the waterfall. The most important question is the capacity of the pond where this waterfall will be installed. If it is a large pond 4000+ gallons, there should not be a real problem. Anything smaller than 4000 gallons could present a problem which increases the smaller you get. Limestone can be beneficial in buffering the pH of the water. Koi will usually adapt to most any pH between 6.0 and 8.5, the key is to control wide swings in pH levels during a daily cycle. It would help if you knew which type of limestone it is. If it is calcite or dolomite, you are probably OK if the Pond is large enough.
  4. XStream Aquatics

    XStream Aquatics LawnSite Member
    Messages: 239

    I would rather stick with sandstone, but as hard as I try to convince my customers of that too, 30% of my installs are flat limestone. they're is plenty of it around here if I might say since I live in KY. Anyways most of the limestone we use is weathered which gives us little to no problems. Last year I installed a formal pond with 6" limestone veneers which you have to use mortar, another ph problem. You can use muratic acid on veneers and mortar but be very careful!! I'll post some pics of some flat limestone ponds I've done which hasn't given me any problems. The pic with the three seperate waterfalls was the second pond I had installed.

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  5. XStream Aquatics

    XStream Aquatics LawnSite Member
    Messages: 239

    Here is the pic of the formal with 6" veneers.

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  6. van Oss landscapes

    van Oss landscapes LawnSite Member
    Messages: 5

    I like your style... That is some pretty stuff!
  7. benjammin

    benjammin LawnSite Senior Member
    Messages: 251



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