Welcome to AA. You have found a great site for information and great people with good advice. I would think you would have a hike in the ammonia if the tank doen not have lr
in it already. I would see if you can get some one to hold you tank critters for a while to see if you do have a spike. I replaced my cc
and silica sand for arag. sand a couple weeks ago and have not had any spikes, but I have about 30 lbs of lr
in the tank as well. Best to let the critters bunk at another tank for a couple weeks to see.