3rd problem in the last 10 days (and more to come) is a weid and very frustrating electrical problem.
I had finished my electrical setup and everything was running fine for 2-3 days when all of a sudden my main GFCI started braking every afternoon and only when I was not at home. which caused me to come back home to see the tank at full stop since I don't know how many hours (4-5 max).
Thinking this would be one of my halides I got a second GFCI and started placing it before each of my lights for few days and each time the main GFCI will trip without the second one to indicate the fault. I could start up all items in the tank for hours and nothing would happen and it would only happen when I'm not at home.
Upon a check on all the plugs I was surprised to find this on the input of my skimmer pump with the skimmer working fine.
I contacted an electrician who told me it could have happened due to the plug not being very secure which I doubt because the plug was very secure.
I was happy that I finally fond out what was causing this and left home the follwoing day not worried about getting back to check the tank in the afternoon. Came back at night and tank was down. So this time I added to GFCIs after the main one (one feeding everything in the water and the 2nd feeding everything outside water) and after two days the main GFCI tripped without any of the secondary GFCIs tripping. the electrician told me it could be that the main GFCIs mmight be unable to handle all my load (although its a 20 Amp set to cut at 30mA difference) or I could have mino shorts happening and adding up so the main one is having big differences and the secondary ones are not tripping. so as you see in the picture I now disconnected the 1st GFCI and have a direct line feeding the 1st GFCI which supplies everything underwater and the second GFCI is fed by the same mainline in front of the first GFCI and supplying the lights and fans... so far it is working for the last 4-5 days. I plan to use the 1st GFCI I have to add a backup line for a 2nd return pump, one of the skimmers and only one heater and one T5 this way if any of the GFCIs trip while I'm on travel I will have a backup capable of maintaining the system for few days.
Do you think there is anymore testing I should have done or anything I should do differently?
Also I was always feeling a minor zip if I touched the tankwater and was in contact with the walls or barefooted... and this increased a bit so I got a voltmeter and measured 20-30 volts in the water I checked all my equipment and it seems that my return pump, and the 2 pumps of the closed loops as well as one of the skimmers pumps are all leaking very minor amounts which seems to be adding up. I added 2 grounding probes and it seems fine now. I measure 0 with the voltmeter but I sometimes feel a zip if I touch the water especially at a wound site. do yo uthink it's fine for the fish if the probes are sucking the electricity int he water or will this lead to problems in th future? all these pumps are brand new and I'm really amazed that they are all leaking electricity. should I also worry about this also leaching copper from the pump tubing in the water or does it ususally occur from inside the pump somehow?