Yep, 3-4 x the standard weekly dose divided over 7 days. Per @Zeus.’s analysis in the fe calculator:Makes sense on the doser, I’m going to stick with the premade for simplicity at this time, and will look into dry salts in the future. Will do as advised and make sure dosing every day from now on. On the label TNC complete states to dose only once a week I’m assuming that I take the weekly dose x3 and then divide by 7. With the water changes it seems more logical to dose daily than in 1 hit.
EI is 30ppm NO3 per week, so you probably need at least 3-4x that dose per week, so around 4ml per 10 litres, so 72ml per week - just over 10ml per day.
Bear in mind though, those values are based on one 50% water change a week, so if you are changing 50% per day, you need to increase that significantly to compensate.
If you are currently only dosing the standard TNC recommend dose of 18ml per week, it could well be the reason (along with the hard water iron issue Darrel mentions), that you are seeing some deficiencies.