Mantle Bleaching

[Poriferabob]

Hey everyone! So this blue Squamie is about 5-6 inches, and close to a year in my system. Recently started showing loss of color randomly across the mantle. The only change I had made was the dosing of seachems coral colors. Of course, I immediately stopped the program but the color has not returned. In James Fatheree's new edition of his book, he mentions possible Iodine overdose as a cause of bleaching. Does this look like that to you? Will the color return?

 

[xjiang7]

Any temperature swings?

 

[Poriferabob]

Not super recently. However, during roughly the first 8 months that I had the clam, it was in my seahorse system that runs around 72-73. Moved it to my mixed reef about 3 months ago, which is more around 78. Possible that I’m seeing a reaction so many weeks later?