MGolder
Non-member
So, I came home from my thanksgiving shenanigans and 4 of my 6 fish and my cleaner shrimp had dropped over dead while I was out and me!!!!! What am I thankful for this thanksgiving? my two remaining fish and all of my coral 
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I have a 20 gallon Innovative Marine all-in-one. I run carbon, filter floss, and cheato in the rear chamber... I know the chaeto doesnt do much. I do a 5 gallon water change ever other week. Typically my nitrates are somewhere between 1 and 5 PPM and I occasionally get ammonia spikes after feeding. I have had two ruby red dragonettes, two juvenile clows, a antenatal goby, two pistol shrimp and a cleaner shrimp in the tank for about 8 months with no issues. I added a small cherub angel two days ago. when I got home today the cherub angel was again the return grate, the cleaner shrimp and one of the ruby red dragonettes were being pulled into the live rock by bristle worms and the male clown and female ruby red dragonette were not where to be found. The survivors were the female clown the antenatal goby and at least one of the pistol shrimp. None of my snails or crabs died. I tested the water and the nitrates are at 2PPM, the Phosphate is not detectable, ammonia is less than 0.02 PPM, and salinity is 1.025. The clown and goby were breathing regularly and all of the coral is open and looks very happy. I have two anemone's, one of which I suck in an acclamation box two days ago to get it out of the tank because two medium anemone's are too many for a 20 gallon tank. The acclamation bow is small and likely not large enough to provide the anemone with a comfortable environment.
I have no idea what could kill the fish in 8 hours like that and leave the remaining too seemingly fine.
. I have a 20 gallon Innovative Marine all-in-one. I run carbon, filter floss, and cheato in the rear chamber... I know the chaeto doesnt do much. I do a 5 gallon water change ever other week. Typically my nitrates are somewhere between 1 and 5 PPM and I occasionally get ammonia spikes after feeding. I have had two ruby red dragonettes, two juvenile clows, a antenatal goby, two pistol shrimp and a cleaner shrimp in the tank for about 8 months with no issues. I added a small cherub angel two days ago. when I got home today the cherub angel was again the return grate, the cleaner shrimp and one of the ruby red dragonettes were being pulled into the live rock by bristle worms and the male clown and female ruby red dragonette were not where to be found. The survivors were the female clown the antenatal goby and at least one of the pistol shrimp. None of my snails or crabs died. I tested the water and the nitrates are at 2PPM, the Phosphate is not detectable, ammonia is less than 0.02 PPM, and salinity is 1.025. The clown and goby were breathing regularly and all of the coral is open and looks very happy. I have two anemone's, one of which I suck in an acclamation box two days ago to get it out of the tank because two medium anemone's are too many for a 20 gallon tank. The acclamation bow is small and likely not large enough to provide the anemone with a comfortable environment.
I have no idea what could kill the fish in 8 hours like that and leave the remaining too seemingly fine.
