I lost my Foxface a week ago, and than my dwarf angel today. I'm really getting frustrated with losing fish that seem very healthy one minute, and die the next. I tested all of my water parameters, and even went to the LFS for a second round of testing. Everything is fine with my water chemistry, even the LFS was surprised to see my nitrates and phosphates were 0 with out a ruge. They suggested to check for stray voltage, anybody know how to do this? What do I buy, how much it will cost?? Thank you.