Really good info here early on in my brewing life i used dish soap to clean my mash tun cooler took 3 batches to realize it was imparting horrible off flavors that were falsely blamed on infection.
If your using a GFCI Breaker in your spa panel you need 4 wire to your control box for the GFCI to function correctly. from your Control box to your heating element is where you can use 3 wire. Most people i see on here and myself included all have grounds in the control box and at the pot...