Edwin

Hello, newbie that needs a little bit of assistance. Hoping I can get some advice on wiring from a professional on this forum. I had a hot tub (D1 Lotus bay, worst tub on the market - but that's another story) that was hard wired to 220 volts 50A with a dedicated breaker box. That hot tub was removed about 2 years ago but I still have the 4 bare wires. I just purchased a new hot tub that runs on 15A 110 Volts (cannot be upgraded to 220, will be delivered tomorrow) .... so I purchased a few items to create a 220 to 110, 50A to 15A step down .. but not sure if its correct .. hence the advice needed. I purchased a Leviton 279-S00 50 Amp wall plate with a outdoor box to wire the 4 wires into an outlet (that delivers 50A, 220V), and then i purchased an epicord splitter (https://www.amazon.com/gp/product/B075GGXJGQ/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1) , that, in theory, will change the 50 A to 15A, and the 4 wire outlet into two 3 wire outlets each with 110V. The hot tub has a built in GFCI, but I want to ensure that I have additional safeguards in place. Do I need another GFCI or a surge protector? The hot tub will be outdoors. Colorado.