I know alot of people have those rock structures, the ones where you take peices of rock that are flat and make formations. Forgive me for sounding dumb! :joke: But anyways I'm sure a few of you have these, could you guys help me out with what type of rock to get or how to build or what to glue with? Also has anyone had problems with your rocks effecting your ph or other levels? Thanks, these look really neat and provide lots of hiding spots I'm sure so I would really like to have one! 