white clumps floating

As I recall you can do a test to see if the clumps are inherent good yeast vs bad bacteria. Take a "clump" and squeeze in your fingers and if its creamy like butter then your probably okay it's your yeast. Not creamy is more likely foreign bacteria. Either call Spagnols and get advice or rack and hit with 1 tea of K+ Meta for 6 gallon batch.

Good luck and let us know how it turns out.