Acclimation of new fish, esp. shipped fish.

[moo.]

There are also people (and I tend to agree with them) who believe that ammonia toxicity in the bag is going to kill the fish much more decidedly than osmotic or temperature shock, and that osmotic shock will take place anyway even with a 30-minute-plus drip acclimation. This group also believes that temperature shock is a non-issue, as long as the temperature change is from cooler water to warmer water, not the other way around.

I am one of these people. When I recieve a shipment of fish at work I cut open the bags dump the fish and water through a net and pop the fish into the tank.

We tend to lose alot of fish if the order comes in on my day off, my coworkers will float the bag for a while before cutting them open. This causes the temp to rise and therefore making the ammonia more toxic. Alot of the fish will get ammonia burn and end up dying.