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Washing Flourite gravel

Well I think I rinsed flourite gravel all after noon (130lbs).  I never
did get it clear.  I understand what this stuff is and as I clean the
gravel I may be making more clay dust just by swirling it around.  The
first rinse is needed since there is some nasty floating material that
just makes sense to remove.  It sticks to everything.  After a few more
washings there is this fine silt that ought to be ok - just like the
clays people use on purpose for their plants.
It is so fine though - won't it clog up gravel?  What do others do?

Also - what about washing this gravel with chlorinated water - could
this be of any concern?  I was thinking about what effect it might have
chemically on holding iron etc.