Today I was doing some tank cleaning work and it was about that time to change out the sponges in my AC110s. Well, I was up pretty late last night and not really thinking about it, so I didn't turn them off first. Instead, I just lifted up the basket, and a couple weeks worth of waste shot out. SWEET. I did about a 25% WC, hauled it to petsmart, picked up an ammonia extraction insert, and some more regular ceramics, along with another big bottle of prime (had run out). I went ahead and replaced the sponge from the filter I messed up with, and also added another pack of ceramics, I put the ammonia insert in my other filter, did another 25% WC, and went to town with some seachem stability to try and make sure my bacteria all don't get overwhelmed and die. My water params yesterday were 0 ammo 0 nitrite and about 10ppm nitrate, well, i did a test right before i left, .25ppm ammo 0 nitrite and like 40-60ppm nitrate, other than the WCs, stability, and ammonia insert I added is there anything else I can do? I plan to test the water again in another 30 minutes or so to see if there is any change, I feel bad for my fish and now im paranoid to change the sponges out on the AC 50s on my 45 gallon 
... It happens to us all...