Is there any videos on how this is done ?My preference is not to use the calibration solution provided in the Trident reagent kits. The levels are generally too far off (lower) from what I like to run my tank. I prefer to use my Salifert tests on Alk, Calcium and Magnesium and calibrate using those results. I also clean the mixing chamber of the Trident with a q-tip every 2 months when changing out the reagents. Super simple to do once you get the hang of it, don't even have to disconnect any tubes, just unscrew the 4 bottom screws and pop the cover off. Any stain buildup on the sides of the mixing chamber will slowly offset the results of the tests.