Macro algea

[sabyhappy2]

Need some help I got some dragons tounge and it’s not doing so well my grape,feather and blade caloupra are doing great just not the dragons tounge I started dosing iron thinking that was it was wondering if anyone may have any other ideas as to why it’s not doing well

dosing an otherall plant fertilizer (thrive shrimp)
Also dosing nitrogen and iron now (flourish brand)
It’s a 20 gallon
With a regular planted light for freshwater

the dragons tounge is place a little out of the light as I know it doesn’t like as much light

photos attached

 

[vetteguy53081]

Dragons breath is semi delicate and thrives best under moderate glow with iron and iodine in the water along with medium light intensity