I fed my growing boys, in a Aqua one barracks, live bbs and had ammonia levels that were of the chart. Did a complete 100% wc and had a spike again three days later.
Repeated wc, threw out old wool, completely rinsed and cleaned sponge and media then re-assembled. I then squeezed a sponge filter from another tank into a bucket of that tanks water, then rinsed my new wool in that bucket before I added it to the barracks. No problems since but I don't feed live bbs to fish in the barracks now. :-) Ps.....I would use IAL. I love the stuff.