as a quick fix you can try a piece of 1/4 copper tube about 2 inches long ... take the broken part out of the hose and you may need to enlarge the hole in the tank slightly . the copper should be snug and try silicone to seal the copper to the plastic ... it should hold till you get a new tank but most likely you will have a small leak until the tank is replaced ... threading a nipple into the tank might also work