ROCK colour

[michelo]

The rocks are taking a color yellow-green... and the calcarea algae seems that this disappearing...why are passing this?... some parametres:
CALCIo:460
po4:0,25
NO3:30
MAGNESIO:850
ALK:12dkh
ph.8,4

 

[scrmbld33]

do you have a pic? what type of lights?

 

[michelo]

sorry ,i dont have a pic,the light is 2 150mh(80 gal),1 t8 actinic(38w)...