Hi I need some help I had few fish die lately. Been checking water everything looks good from tests. So I was just thinking about stray voltage. I seen people test for AC. So I stuck a voltage pen tester in tank and went off beeping and Turning red. Just to make sure I tested my other tank and nothing no beeping. So I started taking things off the apex power brick. I noticed that just 3 lights and main jaebo return pump no beeps. As soon as I plug heater or power heads beep beep. Then I got out multimeter stuck black end into the ground on power brick. Dropped the red end into water in sump nothing. So I figured try DC. I grounded out on one of the screws on power brick ( apex eb8) and found almost 35 to 38 v. Do I need to be worried must of the pumps and power heads are DC. Need help lost my powder blue,yellow eye and wrasse. The heaters both are high dollars cobalts,powerheads are tuze with controllers and one new jeabo w8