Review on Controller Replaceable Electrode Laboratories Hydroponics by Mike Wallace

so. Shortened version. It's garbage. What makes it rubbish is that the instructions are so very bad. I believe they were written by a child. First you need to search for ph/orp ph-803 digital controller. Here is a verbatim quote from the manual. "It is better to clean within 1-2 months to ensure the accuracy of the reading when measuring over a long period of time." What is English Grammar? Also, any video research you do will not be in English. I spent 4 hours of my Sunday morning doing this as suggested by another review. Vain. Even the videos contradict the STUPID AND POORLY WRITTEN instructions. I have never been able to set the device to 6.86 or 4.01 using only the one button required as per the POORLY WRITTEN instructions. It took a combination of turning both knobs to reach the calibration requirements of 6.86 and 4.01, but this gave a final test result of 10.58, not 9.18 like the POORLY WRITTEN instructions you will be given , state. Also these POORLY WRITTEN instructions say to set the button to test when testing. But later they state to install the set button when testing. The kit also did not include Orp calibration solution. Not sure why not. I'm sure everyone has this stuff handy, right? My God. However. Don't buy this. And if the producer reads this you have to fire everyone who was ever responsible for writing your English because MANNN they suck.