Flocked it with what? Using a flocculating agent often makes things worse, if you don't use it correctly . . . and sometimes the only 'correct' way to use floc, is to leave it in the bottle.

Did it settle? Did you vacuum it to waste? What sort of filter do you have? Most flocs are intended to settle, and be vacuumed, and NOT to be filtered. Filtering one of these can make things worse.

What are your current chemical levels?