Chalice question?

[toyencounters]

I have about 20 chalice colonies all doing awesome! Except any chalice with blue or purple the blues and purples are faded any ideas?? Cal 425 dkh 9.1 mag 1380 temp 78 and stable salt 1025.

 

[toyencounters]

6 24watt ati bulbs 1 Fiji purple 1 aqua blue special 4 blue plus.