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Old 02-10-2010, 11:03 AM
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Niagara Falls Niagara Falls is offline
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Location: Brockville, Ontario, Canada
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Type of stone

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.
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Old 02-10-2010, 11:23 AM
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tadpole tadpole is offline
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Limestone will raise the pH of the pond water. A high pH can cause problems for fish and is unsuitable for most aquatic plants.
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Old 02-16-2010, 05:00 PM
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Niagara Falls Niagara Falls is offline
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Raise the ph to what? Is there not some way to neutralize this?
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Old 02-16-2010, 05:32 PM
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tadpole tadpole is offline
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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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