So I had some fossils that I found and they were just laying in a drawer so I figured I'd add them to my tank and make use of them. I hadn't even thought about them raising the pH. I looked further into it and turns out the fossils are limestone and can definitely raise the pH. From what I've gathered, they can raise the pH to about 8.4 and won't go above that. I know neos need a pH a bit lower than that but I have been reading and it seems many people keep neos in the 8 - 8.4 range with no issues at all. I know neos are pretty hardy and can adapt to varying pH pretty well. It doesn't seem like too huge of an issue, and I have a planted tank with soil which can definitely buffer that pH down. On a positive note, limestone is mostly calcium carbonate so would be beneficial for exoskeletal health and molting. I don't have any shrimp in there yet so no harm done either way. I can always remove the plants I've glued to them and take them out. Anyone have any thoughts on this?