So while I have been away, my lady has been looking after my tank and doing water changes and tests for me. She takes a drive to my place to do this so she doesn't spend hours staring at it during the evening. Now the problem, my torch coral has been half eaten and my peppermint shrimps have vanished. I was given some live rock from a guy who has a few kj's of fiji in a small container, (heater and powerhead running) with no light for 2 months. When I added some of the rock I discovered that over night my hermit was torn to pieces, I found this guy... He was removed. Everything has been aces since that, say 3 weeks ago. Now, my beautiful torch coral is half of what it used to be. is there a good chance there are more of these crabs in the LR? Another strange thing is my salinity has droppedfrom 1.024 to 1.018 almost over night. Previous tests were done 4 days ago and read 1.024. I have no livestock other thank a CUC, a porcelain crab included.