We bought a used hot tub and installed it in our garage. We wanted to make sure the item is clean and stays clean. It suited us perfectly! PH tested 7.5 (neutral). TDS/EC tested 300 (drain and re-clean up to 1500). The temperature was 97 F. And in the box were spare batteries for both devices! The instructions for use were simple. We already had distilled water on hand so we could use it right away. Instructions for calibrating the PH meter were included as well as calibration powder. We've saved this for later, assuming the device has been calibrated, which it appears to be. The pH manual was written in cyan (blue) and may not have enough contrast for all viewers to read, but it was fine for us. No negative comments that we can imagine. My wish list: a waterproof bag with a loop so I can hang it next to the hot tub, but I can buy it. The box is smaller than a portable keyboard, so I can probably snag a pencil case that fits. I love the box and want to keep everything in it, or a pencil case would definitely do.
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