Octopus #3, who had previously been eating while #2 went through his bout of lost appetite, has recently been eating less and less each day by about .3g of shrimp. Otherwise he seems normal. #2 is eating normally again, though I think the octos are a little bored. I was concerned about the filter in his tank. It was not meant for a 50 gal, but it was all I had in the meantime. Octo #1 died of unknown causes, and when I tried to reuse his filter, I nearly got electrocuted because of a massive short. I was afraid maybe the increased water load was doing something to the filter that might be effecting the octopus. I removed the filter, since it seemed to be not doing so well anyway. Could there be some kind of weird electrical thing that could have harmed/upset the octopus? Any ideas on how to get him to eat again or what might be wrong?