fish dead

I woke up yesterday morning to find all my fish dead. But my pistol, shrimp cleaner, shrimp, hermit, crabs, and snails survived. Corals were stressed out too. Not too sure on how this would’ve happened, but here’s some context. The night before I noticed that my Canary blenny was not doing well...

I have had my fish tanking going for about 4 months now and although I am quite new to keeping fish I had done a lot of research prior to owning them. It is important to note that about 3 months ago I had what I believe to have been Columinaris which went through my tank and killed all but a few...

Well, seems like all my fish which just arrived Monday are dying. Many came seeming to be very stressed and some with physical signs of some sort of problem. So far, 5 of them have died. This is mainly anthias and wrasse. They pretty much all seem to start having rapid respiration and develop...

So I just got home today to find that my fairy wrasse had died but this isn't what my question is about. Should I now do a water change to avoid an ammonia spike? I removed what was left of the carcass but it looked like my snails and crabs had been eating it for a few hours maybe. I did a water...

Need some major help. For the past 6 months ive been struggling with my first marine tank, I keep getting help from these guys at the pet store, but alot of time their advice controdicts themselves. Right now my tank is just some live rock, sand, 2 cleaner crabs and two ocellaris clownfish...

Would like people's thoughts on this. I have been keeping a mixed reef tank for years now, and have always fed my fish with mainly frozen foods! Last night I fed them with frozen krill, and to my surprise a white feather was introduced into my tank via the frozen krill. The very next day my...