cloudy, white goo behind carbon filter

[catchndolphn]

i added live rock along with some purple power to my tank today and it turned white, i understand it will do that, but it has been white since this morning, now a white goo is beginning to form behind the prefilter on my active carbon filter. did i do something wrong with chemicals? or is this a bloom?

 

[tecwzrd]

What is purple power? Do you mean PurpleUP?