Trident controlled dosing

[Gtinnel]

I've seen a few threads recently discussing alk swing and it got me wondering for those who use Trident controlled dosing what are your usual alkalinity swings. Mine stay around .25dKh with it usually not changing any more between tests. For those whose swings are incredibly low how do you do it?

 

[blaxsun]

±0.25 dKH and I have it set to ±0.20 with a max 50% variance. The biggest challenge is the reagents that seem to become less and less accurate over time. When I recalibrated today with new reagent my alkalinity was off by -0.64 (reported @8.16 dKH when it was digitally tested with a Hanna @7.60-7.65 dKH).

 

[Gtinnel]

So far my readings seem to stay fairly consistent throughout the bottle of reagent. The biggest issue I have is my reading being off with the calibration solution, which I'm not going to use anymore. Right now my cal reading is 90 too high and my mag is 200 too low. Alkalinity matches my other test kits though.
Although I am relatively new to the trident having only used it for about 4 months