I'm a little confused is there a path from your reflectors to the tank? Electrical is not my strong suit so I'm just curious.Well I think I found an issue also tonight.
Decided to test for voltage tonight because as I sit here driving myself mad thinking of everything that has happened over the last couple months and it hit me.
This is crazy I know. Sometimes when I was on my step stool next to the tank with the canopy open I would sometimes brush my forehead or arm across the edge of the T5 lamp reflectors. It would give me what felt like a slight shock. I thought there might be a grounding issue but stopped thinking about it once I would look at the ballasts and see the ground wire plugged in.
SMH!!! I cant believe I would let myself go this long with out even testing why that happened. My company does all low voltage work and I have multiple electrical licenses!!! I am kicking myself right now.
I pulled out my meter and went to test. I raised the canopy and what did this dummy find? My ground probe out of the tank and sitting on my overflow cover. And when did I remove this? I removed it the same time I raised my T5 lights up to their permanent location. I had them mounted temporarily for a couple weeks before moving them.
When I went to move the lights up I dropped a screw in the tank. I had to dismantle my rockwork to get the screw out. When taking the rocks out I moved the probe out of the tank and up onto the overflow lid. I never put it back.... SMH
I tested with both probes in the water and nothing. Also tested with one lead in the water and one to the ground probe and got nothing again. However, when touching the light reflectors to water I was getting 35-40v AC. I got the same thing to the ground probe. Could just be the meter capacitance but also could be the tank as well.
I threw the grobe probe back into the tank immediately.
Might not amount to anything but it could also be something that happened during this time that upset the corals. Can add it to the list.