Although you can have coraline (lots of colors), you will prolly do best with readings such as:
= 400 - 450
= 4.0 - 4.5 Dkh
= 8.0 - 8.4
Temp = 80 - 84
= -10 meg/L
There are others, I dose Iodide and >>>>Oceans Blend<<<<
2 part solution.... This keeps everything in the right params...
I also have a 4X96 watt PC
, with 2 - Actinic and 2 - 10,000K bulbs on a 55 gal
...Plenty of light..
Coraline is growing now pretty good.. I never got the bleaching effect on mine, it just didn't take off until about 3 months ago and this tank has been up for a year....
Don't get discouraged, if maintained well, it will return without fail...