In the temple you went into the first door in the water room and got the ke y out of the chest but you didnt have the gale boomerang so you got the boomer went back in and you didnt have the key wat d?

It seems like there might have been a misunderstanding or oversight in your actions. After obtaining the key from the chest in the water room, you would need to ensure you have the Gale Boomerang to access other areas. If you're back in the room and still do not have the key, check if you need to reset the room or if there's an alternative way to reach the key again. Make sure to explore all possible interactions and items in the temple to progress.