We've tried nearly every test kit out there and have even tested many of them in our own BRStv Investigates video experiments. What we found is that a majority of these saltwater aquarium test kits are indeed very reliable and its actually us, the user, who are often doing things all wrong. Be smarter than us and just avoid these mistakes altogether so you can rely on your reef tank test kits each and every time. View Top Reefing Mistakes Playlist on YouTubeFollow us on Facebook, Instagram, and TikTokVisit BulkReefSupply.com