Going to a 240V 30 amp system. So consensus out there on wiring it to a standard double 30 amp breaker or a GFCI breaker? Have worked with a 2000w element in my 5 gal system on 120V & never had any issues.
Using the standard breaker increases your risk of shock and can cause sparks where you don't want them. It's cheaper though, or you have one handy.