A QUICK RINSE IS ALL THATS NEEDED, 5 TO 10 SECONDS WORKS WELL, ALSO PUT IT IN A SOCK. THE DUST WON'T HURT YOUR FISH OR TANK.
IF YOU FORGET TO CHANGE IT AFTER 3 WEEKS IT WILL JUST BECOME PART OF YOUR BIOLOGICAL FILTRATION.
IF YOU FORGET TO CHANGE IT AFTER 3 WEEKS IT WILL JUST BECOME PART OF YOUR BIOLOGICAL FILTRATION.