My first kit is bubbling away, but at 18C and not the kit instructed 20-25C (mangrove pale ale). It's in the garage, and I don't really want to bring it into the house. Is the lower temp ok, or should I be looking at a belt or pad? These are either on/off - do people use a timer plug, and if so, how often and for how long does the brew need a boost? It's bubbling... So not massively concerned about fermentation stalling.