I don't know. I'm going to be recommending a 3-stage trial:
1. Try to settle with nothing. Vacuum to waste if it works.
2. Add floc, and try to settle. Again, vacuum to waste if it works.
3. Add clarifier, and try again.
During the recirculation steps (2 & 3) it will be important to bypass the filter. I do know that sand filters can 'break' floc agglomerations.


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