Yes. But I would regard the 0.6 PPM a week as medium though, not small.
To give you some perspective:
The EI article here (
https://www.ukaps.org/index.php?page=dosing-with-dry-salts ) calls for 0.5 PPM of Fe a week.
ADA Green Brighty Step 3 will give 0.017 PPM of Fe daily (or 0.119 weekly) per normal dose. But ADA also recommends overdosing it 2-3x if the plant mass is large. Which makes it 0.357 PPM a week for 3x.
From EI daily methods or PMDD + PO4 thread posted by Tom Barr (
https://www.ukaps.org/forum/threads/ei-daily-methods-or-pmdd-po4.915/ )
Adding 2.5 ml of Tropica TMG (now it's called Premium Fertiliser) to a 20 US gallon (75L) tank daily is 0.024 PPM of Fe a day, or 0.168 PPM a week.
Target of Fe in Aquaponics (which is a system where people keep fish to eat and use the water to grow vegetables) is...... 3 PPM (yep, three PPM)!!!. They don't dose other metals though, just iron. They test the water and try to keep Fe level at that level. Fe-DTPA and Fe-EDDHA are popular in this area.
Me? I used to dose 0.162 PPM of Fe daily because the DTPA chelator I used was of low quality. The iron precipitated easily. Now since I've changed to a better DTPA (Dissolvine D-Fe-11), I now dose 0.07 PPM daily, or 0.49 PPM a week and still get better results than before. I do 66% water change weekly.