I have heard mixed things about limestone used in ponds. Some things I've read say it will raise your ph others say it isn't a problem. A family friend has a limestone quarry which means lots of nice, free rock. I don't plan to put it on the bottom but it would be used on the edge. There will be a small beach but I was going to use river rock for that. I'm sure some of the limestone will come in contact with water since I want to stack it so my liner doesn't show at all. There are different types of limestone and maybe that is where the confusion is. I think this kind is yellowish and hard, not the kind that chips easily. Anyone use limestone in their ponds?
Thanks!
Eve
Anyone with limestone rock in their pond?
With that limited a contact I don't think you'll develop a problem. There are some who test limestone for calcim content with a fizz test.
"Effervescence (the Fizz test): Minerals containing calcium carbonate (CaCO3) will generally react when exposed to weak acid (usually hydrochloric acid (HCl), but even vinegar will work). Carbon dioxide (CO2) is released and the mineral or rock literally "fizzes." Some may need to be powdered (increases surface area) before any reaction can take place."
The stronger the reaction the more likely the rock will precipitate. But, again if contact is that limited, ie. not under running water or perpetually submerged I wouldn't turn down free rock!
I think it is low in calcium carbonate, 2-4% I should also be able to get some free granite rocks too. Lots of pink ones in the area, which is okay in moderation but I would rather not have an all pink pond.
I have a few river rocks from Colorado and I love those the most but my budget says I should take the free ones:)
I'd go for the free, for sure. You are going to have a stunning pond.