help with my efflo

[Bdial]

I have had this colony for a few weeks now and its been looking weird lately. When it came in it was really dark. Almost nutrient rich. I run a zeo system so i placed some of the lightening on that. Now its looking almost bleached in some spots and looks like something may be eating it. Is this coloration normal or should i move it?

 

[stevedola]

looks like alk issues to me. what are your levels?

 

[Bdial]

I just checked them. 5.3. Yeah def an alk issue. I have 20gal wc mixing now. Im gonna do a wc then adjust my dosing regimen. Thanks.
Do you think its position is good? Pe is normally really nice but with the color is it getting to much light or to little flow? Can you tell from the pics or is the alk issue dominating the problems?