I bought a piece of wood for my aquarium at my LFS today and I want to know if anyone has heard of it. It's called Caspian wood. It's supposed to lower the ph im my tank. Which I need very much because over time my ten gallon tank has gone from 7.6 to 8.0. I haven't found any info on Google about Casoian wood before anyone asks. So any advice on if this wood lowers ph well would be greatly appreciates. Thank you.