I did it on a fish room at my last house. It really is no problem, pop in 2 breakers, screw the white, red and black wires to the correct place in the breaker boxes, and in the plug boxes in the fish room, and drop and run the wires where they need to go. But after I did it, people said" If you have a fire, they will see that and know it wasn't done by an electrician and the insurance company might not cover it." Well I dont know if thats true, but it could be. It would be safest to get a certified electrician- especially when you have salt water and electrity, and all the amperage needed to power all the stuff.