Aussie Torch fading / bleaching

[nasotang]

I’ve had an Aussie gold torch in my tank and has been doing fine till about a month ago. It went from Golden with purple tips to a pale yellow with white tips.

Parameters:
Ca- 430
KH- 8.5
PO4- 0
No3- 10
Mg- 1300
Lighting- 10x54 T5. Par at coral height = 210
Spot feeding 2x per week with - mysis, reef roids, pellets




Can’t figure out what’s causing the bleaching. Other torches look healthy.

Anyone experience Aussie golds bleaching before?

Some before and after pics attached.

 

[Luisreefmexico]

How did you check your po4?
I think 0 po4 is very dangerous and this type of problems start to appear

 

[nicholasng11]

I’m Not sure if this is true but these torch like lower par. Mine stay In about 120 par