Can you use dead live rock in a freshwater tank sump for filtration purposes?

[perdeep007]

i have dead live rock laying around and was wondering if It would be a good idea to use it for filtration in my sump for a 125 gallon.

 

[bbortko]

From it being a solid object with lots of surface area it will work, similar to lava rock which people use. I'm not familiar with salt water but have a feeling that liverock will raise your ph so depending on your tap ph and what your desired ph is it may not work.

 

[soupa2]

i have crush coral for my tank since my pH will drop between water changes.. that is the reason why i have bags of crush coral in my sump area, to buff the pH higher.. depending what you keep like bbortko said..

 

[Lepisosteus]

Yes live rock will work to house beneficial bacteria but like stated it's made of calcium carbonate so it will raise the ph