Do you have a refugium? That would help the most. But if you don't (nor do I -- yet

then the least obtrusive way (ie, without adding chemicals) is to do a water change. Not knowing your setup, it's tough to say for sure, but I find that a good scrubbing of my
cc substrate will do wonders for bringing the levels back in line. Of course, I don't have any subtrate critters in the way either -- might be a different story if you have
LS.
HTH.
Matt