Flourite,,, Did you rinse your mud?????
Rinsed the flourite for my tank and HOLY $*&@#%%$
There are mud balls in the bag,,, golf ball size!!
What I did was get a 5 gal paint strainer bag from the home inprovement store and dump a bag of flourite in.
Some verry verry small sand size particles did make it through, but I think it woorked pretty well.
But man,,,, the amount of muddy watter wow.