I bought an older used hot tub. It calls for 30 amp 230 volt GFCI and a 20 amp 115 volt GFCI circuits in a sub panel. Modern tubs seem to use a 50 amp GFCI spa disconnect as the sub panel. If I used a 50 amp GFCI spa disconnect and divided it into the 20 and 30 amp circuits with regular breakers ,will it all be protected by the 50 amp GFCI ?