1 fish dead, 1 fish missing

[Coralgurl]

Originally Posted by tang daddy

My experience is crabs will eat dead fish or injured not moving fish.

The only other inverts fast enough to catch fish is mantis.

If you haven't added any new livestock recently then it's possible that they didn't die from a disease. It is really weird that the fish would just die overnight tho... And if your other fish are Mia that's even more unexplainable.

I have had fish for a year or 2 then slowly get more and mood skinny almost anorexic then eventually die. Recently I bought a few new fish and mysteriously they stopped then 2 days later dead. Only the new fish passed while the rest are completely fine.

Sorry for your losses!

I did add 2 fish a few weeks ago, 2 wrasses - both are active have not been either bullied or bullies in the tank. I'll check out the tank thoroughly when I get home, testing etc. The fish were fine yesterday, I know for sure I saw the RG and clown on Monday as I was away last week and I always check for everyone. I'm don't recall seeing them yesterday, but I did see the hawkfish as he came over to the side of the tank when I was fiddling with my skimmer and overflow. He was perfectly fine and behaving normally. I should have taken a picture before I flushed him as I was shocked at how messed up he was - but any of the CUC could have gotten to him. He was floating by the top of the overflow when I saw him.

How would I check for a mantis? I had a Scott's wrasse that had a pretty messed up side, thought he scrapped himself on the rocks. I was going to catch him and put him in my sump, but he died before I could get at him. Would it be possible for a mantis to go so long without detection?

[paddyob]

I highly doubt your hermits did this.

Sometimes crap happens that can kill fish. I don't know your system or your habits, but it's usually tank owner caused.

Hate to say missing = dead 99.9% of the time.

Better test your water. Do a water change.

[Coralgurl]

Ammonia is 0 on salifert test. It's at 1 on the API test. Water is mixing, will do a change in an hour or so.

The royal gramma came out 5 mins ago so it's just the clown and hawkfish.

I've had an issue with my skimmer, had a snail caught in the intake. I took it apart, cleaned it but it wouldn't stop over flowing, so I left the plug out and just let it run. It finally stopped last night. I do use filter socks and kept them on during this time. Checked the flow on the return pump, it was reduced, the intake was clogged with cheato, cleaned off and it's running fine.

Last water change was 2 weeks ago before I left on holidays. Tank was looked after while I was away, as the weather was cool, was not worried about the temps. Top ups done and fish were fed.

I'm not sure what I could have done or not done to cause these deaths

[SoloSK71]

I have lost a few smaller fish in the past year and it was not until I turned off all the power and started using a flashlight the last time that I found the remains of one in the powerhead ... since then I have seen a couple of the smaller ones swimming into the chamber of the powerhead while it was off-cycle and I have begun to wonder if I have depressed (or potentially hard-of-thinking) fish ...

Charles