what a (bleeping bleep)!!! I'm never talking to that moron again! he tried to blame the deaths on the fact that i have bad water quality and bad fish.
Of course. people at LFS that don't really know what they are talking about will find anything else to blame. I'd go in and ask the question again, then talk to a manager and point out on the box where it is not safe to be used with inverts/reefs. I'd then ask for a refund.
Take it as a learning experience. It sucks, but it is one reason why I don't trust what other people tell me without finding research to back it up.