limestone

[Minster49]

Does anyone know if using limestone in a koi pond has any affect on the water? In my case, it would be used in the water as part of a structure. I have read on here that lime has an effect on the ph level but is that the same lime in limestone? Thanks!

Minh

[Russell Peters]

Limestone is a buffer and will neutralize acids. In areas where there are large limestone deposits, unpolluted rainwater, which has a pH of less than 5.6, has the acid in it buffered.
I would not worry about using limestone in your pond.

[Minster49]

Thanks, Russel. I was worried that it would drive the pH to levels too high for the koi.

[MCA]

I put in powdered limestone when I add koi clay. keeps this soft GA water from crashing. never had a kH problem in the limestone rich water in TX.

[Russell Peters]

Quote: Originally Posted by MCA I put in powdered limestone when I add koi clay. keeps this soft GA water from crashing. never had a kH problem in the limestone rich water in TX.

That's good to know, thank you.