You might try this:
Add about 5mls per 20 gal of tank of the Flourish.

Do this 3x a week

That's all you need to do for your set up.
Do 50% weekly water changes, add the K2SO4 after the water change and
add the KNO3, KH2PO4 + the traces 3x a week.

It's not the iron that's the issue, it's good plant growth.
I've had 1-2ppm iron levels but they never last long.

You gain nothing by dosing daily vs 3x a week.
I dose on the water change day and then 2 times more.
Your plants don't need any more.
Regards,
Tom Barr