I assume I already know answer but just want to confirm thought process and maybe use your response to prove to wife that I need to spend money on new lights. My open brain seems very healthy except that it is increasingly flattening out and losing its green pigment. I am assuming it is due to my lights ( marineland reef capable LEDs. Don't laugh) All other parameters are good except that I am at the end of winning battle with cyano. Here is a picture months ago. Now it lost most of folds and the whole inner part is brown. I can post the today photo when I get home. Could there be another reason?