American Marine Pinpoint pH Monitor
Product Review (submitted on April 22, 2011):
This unit works very well if you follow the instructions for maintenance on calibration and probe usage. The initial set-up for this monitor and probe is continuous on one tank, and you can use the monitor for dosing of some type of buffer in your tank. If your tank is Salt, high PH freshwater, or a very soft PH this type of a monitor will help keep your fish healthy. On the down side of things with this monitor is that it is not moving from tank to tank, if you have a large collection of fish, or operate a fish room, than another monitor or controller would work better.