So, I was asked a question about my seneye reef monitor with Wi-Fi. I have two tanks- one totally APEX and the other a do-it-yourself set up I pieced together. The APEX has not given super reliable readings- salt always incorrect and pH below actual readings. So, I tried the seneye. The system was easy to set up- the Wi-Fi web server was a little finicky- but I got it working. The pH works perfectly - the temp is always accurate. The par meter is ok. I really look forward to the release of the more detailed par meter- which has good reviews. Also, the slides and software for dK, cal and mag are supposed to be released in the near future, so would be interested in seeing comparisons to the Neptune Trident- whenever that releases. But for what it is, the reef version of the seneye works for my little nano tank quite well. The replacement slides are a little expensive, but I like it for its compact size and convenience.