I don’t use the calibration fluid from Trident since I’m using ABC reagents and they don’t provide calibration fluids. So I take a sample of the tank water and use my Salifert test kits to measure Alk/cal/mag. Then I take those numbers and input them into the calibration of the trident, and have it calibrate to those numbers. Done.
if you have a calibration fluid, then I would double check that fluid with the Salifert test kits to confirm it’s correct. Then put the numbers from the salifert it while calibrating from the calibration fluid.