suds in my wet/dry

I noticed today that my wet/dry had suds in the top tray on the filter pad and a little in the bio balls. What's going on? I'm going to change the pad tomorrow since it's 2 A.M right now. Just want to hear some suggestions.
 

mr . salty

Active Member
Do you have a skimmer running on this setup?? If so,is it working properly?? I'm just thinking this foam may be excess waste,and disalved protiens that normally would be pulled out by a good skimmer.
 
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