euro reef skimmer going crazy

Oakie

New member
Have an in sump skimmer run by 3 Sedra 5000 pumps. Every now and then, for at least no apparent reason, the skimmer goes nuts. It fills the bucket and then overflows into the sump. Last example is over night. Checked everything around 10 last night. Went and looked this morning and the skimmer was overflowing. I do clean the tubes from time to time.
 
Do you add anything to the tank before this happens such as calcium or amino acids?
 
no, that's the odd thing about this. It's on a fowlr so I really don't add anything other than food - flake, mysis and pellets
 
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