Also it might be worth a mention that only one wire per entry way is allowed, no sharing, since it may be that the spring connection might only grip one wire leaving the second one with a loose fit, with arcing and heating being a distinct possibility. Been there, tried it, not recommended.
Hi. Sid. I would want to place my bet on your fridge or freezer as the culprit. I have just come up with the same problem at my neighbours establishment. He has a shed with an egg dispensing self serve machine in it.
My checks of the supply found it to be clean, but when the fridge starts the...
Just a suggestion, you might spend a few quid on a mains filter, ( AC250V 6A Noise Suppressor Single Phase AC Power Line EMI Filter 50/60Hz UK ) . The outgoing earth will need to be connected to the case in this one but there are many to choose from. I would say 6A , or 10A type depending on...
I hope you do not mind me putting in my thoughts on the matter of heating the tanks, but heating the room by whatever means is not the way I would go. You have no means to keep the water at the correct temp. bearing in mind that the fish will require a fairly narrow temperature range to...