I’ve been getting ready to set up my old 29 gallon for a South American cichlid tank. I have the substrate and have plants coming in today. I bought some Sieryu rocks for it that I thought would be ok but now I saw somewhere online that they will raise the ph . My tap water has a ph of 8, gh is 0or 1 and kh is 9. I’m also adding a nice piece of Malaysian driftwood to it. Can someone tell me if I would be able to use these rocks or would I have to get some other ones? I’m really hoping to be able to use them as I’ve already bought them and their really quite nice.