GRRRRRR.... fish being killed!!!

 So fomething in my tank is attacking my fish, killing them then eating half? I have narrowed it down to a select few. Cleaner shrimp (he agressively has been chasing my fish lately and has not been coming up to my hand to eat like usual? must be full?) Emerald Crab ( heard these can be aggressive and territorial in a small tank) and Tiger Pistol Shrimp ( Just heard they may attack things as well, I feel its not likely since I hardly even see the lil guy) any suggestions? I have a percula clown, black ray goby paired with the pistol shrimp, green clown goby, and had a rainford goby but he died today. others to have been killed, peppermint shrimp, percula clown, blue neon goby.

well i had the water checked this week and it seemed to be perfect they said, it has been up for 3 weeks and i have kept 3-4 small fish in there with 10% water changes weekly, everything seemed to be healty until this week. I started feeding the fish every other day because i had been over feeding the tank which created a red slime problem, i got rid of that and things started dying, at first I thought it may be ich cause my blue neon arrived with it but lasted for 2 months with it and none of the other fish had it.

Different types of garlic oil seem to work better in different tanks. I like seachem's Garlic Guard, worked wonders with my powder brown tang. I would check for a mantis shrimp, as they can hitch-hike inside live rock. Also I would just use a dim light to check out the tank at night and see if you can find the culprit. 3 weeks is a really new tank, you may just need to take things a little slower and let everything balance out.

IF it is one of the forementioned critters in your tank that is actually doing some killing I would suspect the Clownfish.

CapnMorgan wrote: Different types of garlic oil seem to work better in different tanks. I like seachem's Garlic Guard, worked wonders with my powder brown tang. I would check for a mantis shrimp, as they can hitch-hike inside live rock. Also I would just use a dim light to check out the tank at night and see if you can find the culprit. 3 weeks is a really new tank, you may just need to take things a little slower and let everything balance out.

sorry i meant 3+ months and it was set up at my buddies for 3 more months at his house, so probably close to 6+ months I have had it for 3+ months and checked my water before adding livestock

do you think it could be a mantis shrimp?

they hide alot... so at night might be your best time to try and see them. i have never had one so i am not too sure on size, but i am sure they can be pretty small if they can be hitchhikers

take your rock out deep it in just ro water for a few minutes and watch them crawl out I had 4 and 2 pistol that hitched hike in my rock

Thanks Mark. There was a lot of luck involved. I was photographing Scott Morrell's tank in Idaho and had the camera all set up and in my hand when this guy came out. He never stood a chance!

Thank you all so much! I upgraded to a new tank this weekend and watched for a mantis shrimp, I had a seasoned pro helping me as well. I think the problem was too small of a tank and high salinity level =( all is well now I will post some pics of the new tank soon