Hi all, I'm new to the forum so apologies for the newbie question. I have a 90-gal tank that I've had for 2 years now. Twice in the last two years, my tank has crashed after putting a new fish in from the local fish store. It is a fish only tank -- pretty straight forward. Here's the thing -- I've never quarantined my fish when buying them, although I will be from now on. What are your thoughts on any level of responsibility of the local store that sold me the fish that killed my others? Last year, the infected fish wiped all of my others out with a velvet infection. This year, it was ich. I'm clearly learning a lot about what not to do, but I don't what, if anything, to say to the local store owner. They are really good guys -- love the help I normally get from them, but the reality is that a fish from their store has killed off a lot of my existing fish. Thoughts?