[titus]

Hello Shane,

Well it does look like you are doing periodic water changes. My initial reaction is under sized skimmer. However, until you've actually run a good one we'll never know. Like I've probably said, my tank is also suffering a pH drop because of the lack of skimmer. But so far the tank occupants are doing just as great and corals have been growing. So I'm not worry about it.

Actually you know what? Go get a big airpump and a some good lime wood airstones. Pump some air into the system (ie sump) and see what happens to both the pH and ORP.