There are tricks to get stuck hoses off but without knowing exactly what type of hose and the configuration you may ruin a hose. If it is pipe goop, that usually breaks loose if you get a big pair of channel lock pliers on the fitting. On the GFI trip, I usually ignore one time events. If it reset and is now behaving just ignore it too. These things are like a hair trigger, doesn't take much to trigger an event. Something like a power spike can trip them. If it continues to trip then begin to wonder. Know someoine with a digital camera?
Al