Need help with my Acan Frag

[Jake_Janoski]

So I've had this Acan frag for about a month or so and it's been doing great up until about 3 days ago. I have no idea what could be going on with it. The frag is placed in a moderately lit area and has had medium flow. This tank is a 20 gallon tank, my light hangs about 12 inches off the water surface, the blues are on 60 and my whites are on 15. Also my blues come on one hour before the whites and stay on an hour after the whites go off.

 

[Jake_Janoski]

So I've had this Acan frag for about a month or so and it's been doing great up until about 3 days ago. I have no idea what could be going on with it. The frag is placed in a moderately lit area and has had medium flow. This tank is a 20 gallon tank, my light hangs about 12 inches off the water surface, the blues are on 60 and my whites are on 15. Also my blues come on one hour before the whites and stay on an hour after the whites go off.

hard to see but it it's whitish around the inner part of the frag.

 

[Duffer]

what are your parameters,?...