Works well By Manfred on 1/9/2015Manfred would recommend this product to a friendI use this monitor on my Skimz CM 152 calcium reactor. I have an Apex controller but I have my reactor set up on the opposite end of my 72" 180 gallon tank and I didn't want wires running that far plus I would have had to purchase additional apex equipment to monitor the ph in the reactor making the purchasing of this monitor my best financial optional as well. I found the monitor easy to calibrate and and it works well in monitoring the ph in my reactor. I did find in calibrating the instrument that using the Milwaukee calibration fluid worked better than the bulk fluid I had on hand. So I will purchase more Milwaukee calibration fluid for future calibrations. It is reassuring to see the 6.6 ph level displayed on the controller which means my reactor is operating at the optimum level.
works great no issues By Paul on 3/30/2011Paul would recommend this product to a friendworks great well worth the money