Ok, here's my experience with stability. I had a tank that I had fishless cycled. I apparently didn't do enough, because even though ammo and ites had turned into ates, when I added a fish, ammo spiked. added stability, well shaken, and cycle appeared to progress normally(maybe abit accelerated, took about a week). The difference was in that when ammo was 4.0, and ites were .5, the fish did not appear stressed at all! it was a male pearl gourami, and it had a chest full of gold the whole cycle. They lose their gold if there is a loud noise. ANY stress, and it is gone. that was incredibly confusing, as logic told me I would probably lose this fish. I did some research and found that stability 'locks' ammo and ites, making them non-toxic. They still show up on tests, but they don't harm fish. After my experience, I would stand by that. Just remember to shake the stability! Otherwise, you might wind up with ammo and ates and no ites!