I made this control panel to run my tank, it has a 30 amp gfi 240v supply from the wall, two switch relays, solid state relay for heating element, fused 110v bus bar. Main power is the green, red is the heating element, and blue the water pump. The pid controller keeps the temp at 90 degrees.
It also has an amp meter, but i think i fried it. The numbers are all over the board.
It cost me roughly 400.00 to make this and alot of research.
If i had to do anything over on it id go one step higher on enclosure size, its pretty packed in there and makes it harder to work on.
Big tip for those looking to build one....
Google electric brewery.