Accordint to Seachem iron test it's almost non-existent, even though I dose 2ml 3 times a week.Scrubbing, syphon the debri and H2O2 the spot helps.
Fix your other issues too like too much micros/iron, light, CO2. If you have mulm in your tank, clean that up helps also clean the mulm out the filter.
Interesting. I will stop adding extra iron.BBA is a pretty good indicator of too much iron. If your plants are hurting from too little iron, that's you indicator as well.