You should rinse the flourite for that very purpose if nothing at all..
I rinsed 6 bags when I did mine in a 5gal bucket, took about an hour...filled tank and it was done, you don't have to worry about muddy water for a week+
If you don't rinse it, I would suspect that if you do anything major in the tank like a complete rebuild, which I do on occasion, that tank will explode with mud again.
And, you will not lose valuable nutrients, or as some call it The good stuff only rinsing the crud out.
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