GHA - Algae scrubber question advice

[Edgar F]

Hi everyone
I have a clear view scrubber i did my cleaning today and notice a yellow crust on the screen i did notice that no algae was growing on that part of the screen.
does anyone know what that crust is?
Ive been running the scrubber for a while not a lot of grow on it still fighting some GHA on my display

my lights schedule its from 10.30 am ramping up to 9.30pm, i did remove all whites of my schedule to help battle that GHA but no luck still growing. I was planing to reduce my light period in half to see if that helps.
my po4 is a bit high working on it .11
no3 - 7.9
using Elim NP to work on this .....works great btw

I was thinking of using reef flux in combination with vibrant to finish off the GHA, is it a bad idea or should i continue the course of treatment that is keeping phosphate and nitrates low to eliminate the algae ( I already see some part getting more white of the GHA)

any other advice will be appreciated

thanks all!

 

[vetteguy53081]

What light is in the scrubber and how long is it on?
Sounds like light deficiency

 

[Edgar F]

What light is in the scrubber and how long is it on?
Sounds like light deficiency

I had the lights on for 14 hours in opposite of my display. this week i changed to 18 hours also i did cut my display lights from 12 hors to 6 hours

 

[vetteguy53081]

I had the lights on for 14 hours in opposite of my display. this week i changed to 18 hours also i did cut my display lights from 12 hors to 6 hours

That should have promoted algae…. Hmmm

 

[Edgar F]

That should have promoted algae…. Hmmm

I had my display light setting to a lower % and with 75% aclimatation.
not sure if reflef flux is the way to go or continue the current ciurse of action of lowering po4 and no3 to kilke GHA

 

[vetteguy53081]

Chaeto needs iron and if you’re dosing flux or NoPox, it will destroy the chaeto

 

[Edgar F]

I dont have Chaeto I have an algae scrubber, but im guessing it will be the same result. if i did reef flux will probably have to take it offline for the time of the treatment