I ordered a generic canister off www.aquatraders.com the other day, and i purchased a generic canister for my friend. Apparently when he installed it and started runnin the canister, the widebar in there starting acting kind of funny. But the stingray was ok. When he woke up this morning, the ray was upside down dead and when he picked up the dead body, the skin was falling off due to ammonia burns. Does some1 know what happened? The canister and its media was properly rinsed before usage of course. Thanks in advanced. BTW he did not change filters, he had an emp400 runnin and just added the canister on top.