Texas holy rock for base

[I am in progress to convert my freshwater to saltwater. Is it possible for me to use existing texas holy rock (freshwater) in the saltwater tank? If it is possible, then i will add more live rock with it. I need your advices, please help!.
Thanks]
 
[I use two chuncks of Texas Holey Rock in my startup aquarium. I have found out that reef tanks like a higher pH than even african chillid tank, in the range of ++8.

So if you want to pick your own rocks, go to Ellis county where the stuff is harvestable, but I see you already have a nice specimen. =)]
 
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