I found some of these rocks and I know they are sandstone, but I am wondering if they would be okay in my planted tank. I posted them in a Facebook page about planted tanks and have gotten very mixed answers, so I was hoping that by posting it on here, I would get some better answers.
I also was wondering if they would affect the balance in my tank, what if I sprayed them with clear pond sealant? Would this work for them or no?
Thanks in advance.