As I PM'ed keep an eye on levels and do water changes as needed things should stables, we all hope. try and get some of that ammonia reducing floss at a local LFS costs about 10 dolors. helps for emergincies like this. Snails and the rest of the cleanup crew are doing good then if any thing has died they will find it and take care of it. You could have some worms that died do to the ALK dose or some thing else. Now you should reduse the light period to help combate any algae groth that may follow this crash. Give us a post before you leave for work if you have a couple of seconds how the fish are breathing and such. give new peramiters when you can, all that youo have test kits for anyways.

Bill